Common Diseases in Humans – (Causes, Symptoms, Prevention and Treatment)

Common Diseases in Humans

(Causes, Symptoms, Prevention and Treatment)

Common Diseases in Humans: Causes, Symptoms, Prevention and Treatment

Common Diseases in Humans Introduction

In this article, we will explore some of the most common diseases that affect humans, their symptoms, causes, and available treatments. Diseases can significantly impact an individual’s health and quality of life, and understanding them is essential for prevention and effective management. Let’s delve into the world of these ailments, their impact on human health, and the steps we can take to lead healthier lives.

1. AIDS (Acquired Immunodeficiency Syndrome)

AIDS is a severe medical condition caused by the human immunodeficiency virus (HIV). The virus attacks the body’s immune system, making it difficult for the individual to fight off infections and diseases. There is currently no cure for AIDS, but antiretroviral therapy (ART) can help manage the symptoms and prolong the patient’s life.

2. Alcohol Liver Disease

Excessive and prolonged alcohol consumption can lead to alcohol liver disease, which includes conditions like fatty liver, alcoholic hepatitis, and cirrhosis. Reducing or abstaining from alcohol is crucial for preventing further damage and allowing the liver to heal.

3. Allergies

Allergies occur when the immune system overreacts to certain substances, triggering symptoms like sneezing, itching, or rashes. Avoiding allergens and using antihistamines can help manage allergy symptoms effectively.


4. Alzheimer’s disease

Alzheimer’s is a progressive neurodegenerative disorder that affects memory, cognition, and behavior. While there is no cure, early diagnosis and certain medications can improve the quality of life for those affected.


6. Angina pectoris and MI (Myocardial Infarction)

Angina is chest pain or discomfort caused by reduced blood flow to the heart muscles. If left untreated, it can lead to a heart attack or MI, where a portion of the heart muscle is damaged due to a lack of blood supply. Immediate medical attention is crucial during such events.


7. Appendicitis

Appendicitis is the inflammation of the appendix and requires immediate surgical intervention to prevent it from bursting, which can lead to severe complications.


8. Arthritis

Arthritis is a condition that causes joint pain and stiffness. Regular exercise, physical therapy, and medications can help manage the symptoms and improve joint function.


9. Asthma

Asthma is a chronic respiratory condition characterized by inflammation and narrowing of the airways. Inhalers and other medications are used to control asthma symptoms and prevent attacks.


10. Atherosclerosis and arteriosclerosis

Atherosclerosis involves the buildup of plaque in the arteries, leading to narrowed and hardened arteries. Arteriosclerosis, on the other hand, is the hardening of the arteries. Lifestyle changes and medications can help manage these conditions.


11. Autoimmune Hepatitis

Autoimmune hepatitis is a chronic liver disease where the body’s immune system attacks liver cells. Immunosuppressive medications are used to manage the condition and prevent further damage.


12. Bladder Cancer

Bladder cancer affects the lining of the bladder and is usually treated with surgery, radiation, or chemotherapy, depending on the stage of the cancer.


13. Brain Cancer

Brain cancer can be benign or malignant and requires a personalized treatment plan, including surgery, radiation, and chemotherapy.


14. Breast Cancer

Breast cancer is one of the most common cancers in women. Early detection and treatment play a critical role in improving survival rates.


15. Cancer

Cancer is a broad term that encompasses various diseases characterized by abnormal cell growth. Treatment options depend on the type and stage of cancer and may include surgery, radiation, chemotherapy, immunotherapy, or a combination of these.


16. Cell injury – Introduction

Cell injury is the initial step in the development of many diseases. Understanding the causes and mechanisms of cell injury can help in disease prevention and management.


Cell Injury_Homeostasis

Maintaining cellular homeostasis is crucial for overall health and preventing various diseases.


Cell injury – Reversible

Some cell injuries are reversible, and timely intervention can restore cellular function.


Cell injury – irreversible

In some cases, cell injury becomes irreversible, leading to long-term damage or cell death.


Cell injury – Chemical Modulators 

Chemical modulators can influence cell injury and impact disease development.

17. Cataracts

Cataracts cause clouding of the eye’s natural lens and can be treated with surgery to replace the lens.


18. Cervical Cancer

Cervical cancer is preventable through regular screenings and vaccination against human papillomavirus (HPV).


19. Chikungunya

Chikungunya is a viral disease transmitted through mosquito bites, and its symptoms can be managed with rest and pain relievers.


20. Chlamydia

Chlamydia is a common sexually transmitted infection that can be treated with antibiotics.


21. Cold and Flu

Common cold and influenza are viral infections that can be managed with rest, hydration, and over-the-counter medications.


22. Colorectal Cancer

Colorectal cancer affects the colon or rectum and can be treated through surgery, radiation, and chemotherapy.


23. Conjunctivitis

Conjunctivitis or “pink eye” is an inflammation of the eye’s conjunctiva and can be caused by viruses, bacteria, or allergies.


24. Congestive heart failure

Congestive heart failure occurs when the heart is unable to pump blood effectively, and it requires lifestyle changes and medications for management.


25. COPD

COPD is a group of lung diseases that cause breathing difficulties and requires long-term management and lifestyle adjustments.


26. Coronavirus and COVID

COVID-19 is caused by the SARS-CoV-2 virus and can lead to severe respiratory symptoms. Vaccination, wearing masks, and practicing good hygiene can help prevent its spread.


27. Dengue Fever

Dengue fever is a mosquito-borne viral infection, and there is no specific treatment other than supportive care.


28. Depression

Depression is a mental health disorder that can be managed through therapy, medications, and lifestyle changes.


29. Diabetes

Diabetes is a condition where the body struggles to regulate blood sugar levels. Proper diet, exercise, and medications are essential for diabetes management.


30. Diabetes Mellitus

Diabetes Mellitus can lead to complications like diabetic retinopathy, neuropathy, and nephropathy.


Diabetes Mellitus – Complications

Managing diabetes complications is crucial for preventing further health issues.


31. Diarrhea

Diarrhea is a common digestive issue that can be managed with hydration and dietary adjustments.


32. Ear Infections

Ear infections can be bacterial or viral and require proper medical treatment, especially in children.


33. Eczema

Eczema is a chronic skin condition that can be managed with moisturizers, topical steroids, and avoiding triggers.


34. Epilepsy

Epilepsy is a neurological disorder characterized by recurrent seizures, and it can be managed with antiepileptic medications.


35. Fatty Liver Disease

Fatty liver disease can be reversed through lifestyle changes, such as weight loss and reducing alcohol consumption.


36. Flu

Influenza, or flu, is a contagious respiratory illness that can be prevented through vaccination.


37. Food Poisoning

Food poisoning is caused by consuming contaminated food and can lead to digestive issues. Hydration and rest are essential for recovery.


38. Fulminant Hepatitis

Fulminant hepatitis is a severe form of acute hepatitis that requires immediate medical attention and, in some cases, a liver transplant.


39. Fungal Infections of the Skin

Fungal infections can affect the skin, nails, or mucous membranes and are treated with antifungal medications.


40. Gastritis

Gastritis is the inflammation of the stomach lining and can be managed with dietary changes and medications.


41. Genital Herpes

Genital herpes is a sexually transmitted infection that can be managed with antiviral medications.


42. Genital Warts and HPV (Human Papillomavirus)

HPV is a common sexually transmitted infection that can cause genital warts and increase the risk of cervical cancer.


43. Gonorrhea

Gonorrhea is a sexually transmitted bacterial infection that can be treated with antibiotics.


44. Gout

Gout is a form of arthritis caused by the buildup of uric acid crystals in the joints. Lifestyle changes and medications can help manage gout attacks.


45. Haemophilia

Haemophilia is a genetic disorder that impairs blood clotting. Management involves replacement therapy for clotting factors.


46. Headaches

Headaches can have various causes and are managed based on the underlying condition.


47. Hepatitis A

Hepatitis A is a viral infection affecting the liver and can be prevented through vaccination.


48. Hepatitis A and B Vaccines

Vaccination against Hepatitis A and B is essential for preventing these viral infections.


49. Hepatitis B

Hepatitis B is a viral infection that can lead to chronic liver disease. Vaccination is crucial for prevention.


50. Hepatitis C

Hepatitis C is a blood-borne viral infection that can be treated with antiviral medications.


51. Hepatitis D

Hepatitis D is a rare but severe form of hepatitis that occurs in individuals already infected with Hepatitis B.


52. Hepatitis E

Hepatitis E is a viral infection transmitted through contaminated food and water, and there is currently no specific treatment.


53. Hepatomegaly

Hepatomegaly refers to an enlarged liver and requires medical investigation to identify the underlying cause.


54. Herditary acquired Anaemia

Hereditary acquired anaemia includes conditions like sickle cell anaemia and thalassemia and requires proper management and medical care.


55. High Blood Pressure

High blood pressure (hypertension) is a significant risk factor for various cardiovascular diseases and requires lifestyle changes and medication for control.


56. HIV

HIV weakens the immune system and leads to AIDS. Early detection and antiretroviral therapy are crucial for managing the infection.


57. Hypertension

Hypertension is another term for high blood pressure and requires regular monitoring and lifestyle adjustments.


58. Inflammatory Bowl Disease 

Inflammatory bowel disease includes conditions like Crohn’s disease and ulcerative colitis and requires ongoing medical management.

59. Inflammation – Acute

Acute inflammation is a normal response to injury or infection and is essential for the healing process.


Inflammation – Acute- cellular events

Understanding the cellular events in acute inflammation can lead to better treatments for various diseases.


Inflammation – Chronic

Chronic inflammation can contribute to the development of various chronic diseases and requires proper management.


60. Immunotherapy

Immunotherapy harnesses the body’s immune system to fight cancer and is a promising treatment option.


61. Infertility

Infertility can have various causes and may require medical intervention, such as fertility treatments.


62. Iron deficiency anaemia

Iron deficiency anaemia is treated with iron supplements and dietary changes to increase iron intake.


63. Jaundice

Jaundice is a yellow discoloration of the skin and eyes and can be a symptom of various underlying conditions.


64. Kidney Stones

Kidney stones are solid mineral and salt deposits that form in the kidneys and can cause severe pain. Treatment may include medication or surgery.


65. Leprosy, Syphilis, and Gonorrhea

These sexually transmitted infections require medical treatment and care to prevent complications and transmission.



66. Leukemia

Leukemia is a cancer of the blood and requires specialized treatments like chemotherapy, radiation, or stem cell transplant.


67. Liver Cancer

Liver cancer can be primary or secondary and is treated based on its stage and underlying causes.


68. Liver Diseases

Various liver diseases, like fatty liver, cirrhosis, or viral hepatitis, require different treatment approaches.


69. Liver Failure

Liver failure occurs when the liver loses its ability to function properly, and it may require a liver transplant.


70. Liver Function Test

Liver function tests help assess the health of the liver and diagnose various liver conditions.


71. Liver Transplantation

Liver transplantation is a treatment option for end-stage liver disease when other treatments are not effective.


72. Lung Cancer

Lung cancer is primarily caused by smoking and requires prompt diagnosis and treatment.


73. Lymphoma

Lymphoma is a cancer of the lymphatic system and requires targeted therapies like chemotherapy or radiation.


74. Malaria

Malaria is a mosquito-borne infectious disease that can be prevented and treated with medications.


75. Megaloblastic anaemia

Megaloblastic anaemia is characterized by large, immature red blood cells and requires identifying and treating the underlying cause.


76. MELD and Child-Pugh Scores

MELD and Child-Pugh scores are used to assess the severity of liver disease and prioritize liver transplant recipients.


77. Meningitis

Meningitis is the inflammation of the meninges and requires immediate medical treatment, as it can be life-threatening.


78. Mononucleosis

Mononucleosis, or “mono,” is a viral infection that causes fatigue, sore throat, and swollen lymph nodes.


79. Multiple Myeloma

Multiple myeloma is a type of blood cancer that requires specialized treatment, such as chemotherapy and stem cell transplant.


80. Osteoporosis

Osteoporosis is a condition characterized by weakened bones and requires lifestyle changes and medication to prevent fractures.


81. Ovarian Cancer

Ovarian cancer can be challenging to detect in its early stages but is treatable with surgery, chemotherapy, or targeted therapies.


82. Pancreatic Cancer

Pancreatic cancer is often diagnosed at an advanced stage and requires aggressive treatment, including surgery, chemotherapy, and radiation.


83. Parkinson’s Disease

Parkinson’s disease is a progressive neurological disorder that affects movement and requires a multidisciplinary approach to treatment.


84. PCOD

PCOD is a hormonal disorder that affects the ovaries and can be managed with lifestyle changes and medications.


85. Peptic ulcer

Peptic ulcers are open sores that develop on the lining of the stomach, small intestine, or esophagus and require medications and lifestyle adjustments for healing.


86. Prostate Cancer

Prostate cancer is a common cancer in men that can be treated with surgery, radiation, or hormone therapy.


87. Renal Failure

Renal failure is the loss of kidney function and requires dialysis or kidney transplant for survival.


88. Rheumatoid Arthritis

Rheumatoid arthritis is an autoimmune disorder that affects the joints and requires a combination of medications and lifestyle changes for management.


89. Schizophrenia

Schizophrenia is a complex mental health disorder that requires lifelong treatment with antipsychotic medications and therapy.


90. SEX DISORDER Erectile Dysfunction

Erectile dysfunction is a common condition that can be treated with medications or other therapies.


91. Sexual Problems in Women and Man

Sexual problems can have various underlying causes and may require counseling or medical treatment.


92. Sexually Transmitted Diseases

Preventing sexually transmitted diseases involves practicing safe sex and getting regular screenings.


93. Sickle cell anaemia

Sickle cell anaemia is a hereditary blood disorder that requires regular medical care and management.


94. Skin Cancer

Skin cancer can be prevented through sun protection and early detection is crucial for successful treatment.


95. Stomach Aches

Stomach aches can have various causes and are typically managed with rest and over-the-counter medications.


96. Stroke

A stroke occurs when there is a blockage or rupture of blood vessels in the brain and requires immediate medical attention.


97. Thalasemia

Thalassemia is a genetic blood disorder that requires lifelong management, including blood transfusions and chelation therapy.


98. Thyroid disease

Thyroid diseases can affect hormone production and metabolism and may require medication or surgery for management.


99. Tuberculosis

Tuberculosis is a bacterial infection that primarily affects the lungs and requires a long course of antibiotics for treatment.


100. Typhoid Fever

Typhoid fever is a bacterial infection transmitted through contaminated food and water and is treated with antibiotics.


101. Ulcers

Ulcers can develop in various parts of the body and may require medications and lifestyle changes for healing.


102. Urinary tract infection

Urinary tract infections are common bacterial infections that can be treated with antibiotics.


103. Wound Healing

Proper wound care and hygiene are essential for preventing infections and promoting wound healing.



1. Can common diseases be prevented?

Yes, many common diseases can be prevented through vaccinations, adopting a healthy lifestyle, and regular health check-ups.

2. Are all cancers treatable?

Treatment for cancer depends on its type, stage, and the patient’s overall health. Many cancers are treatable, and early detection can improve outcomes.

3. How can I boost my immune system?

Maintaining a balanced diet, exercising regularly, getting enough sleep, and reducing stress can help boost the immune system.

4. Is there a cure for HIV/AIDS?

Currently, there is no cure for HIV/AIDS, but antiretroviral therapy can help manage the condition and improve the patient’s quality of life.

5. How can I prevent sexually transmitted infections?

Practicing safe sex, using condoms, and getting regular screenings are effective ways to prevent sexually transmitted infections.

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Pathophysiology Notes

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