All Diseases from A to Z

Are you looking for information about a specific disease? Then you are right here! In our disease dictionary, detailed descriptions of the most critical conditions are easy to understand and explained by experts. Because often, the important questions about an illness only occur to you after you have left the doctor’s office with a diagnosis. The doctor may also have used technical terms you would like to read up on. Or you would like to learn more about an illness as a relative—all good reasons why we offer you information that laypeople can understand about the most critical diseases.

Find out everything you need to know about the disease and its symptoms. Understand the causes and risk factors of the condition. Read what tests are used to diagnose the disease. And find out about treatment options for the disease.

Current: Seasonal diseases

Some diseases occur more frequently at certain times of the year. These diseases are colloquially called seasonal diseases or seasonal diseases. Typical diseases that recur at a specific time every year are, for example, hay fever or flu. Here you will find diseases that are currently on the rise.

Corona special
The coronavirus pandemic is keeping the world in suspense. Read everything about the current development, the background and how you can protect yourself here.
Cystitis, also known as urinary tract infection (UTI), is an infection of the bladder that results in symptoms such as pain, burning, stinging, or an infection of the urethra. UTIs occur when bacteria from the mouth, or from elsewhere in the body, enter the urethra and travel to the bladder.
A bladder infection causes burning when urinating and frequent urination. Find out how cystitis develops and is treated here!

When dealing with allergies, you may feel like you’re living in a haze. Hay fever, or allergic rhinitis, is a common allergy brought on by pollen, dust, mold, or pets. Hay fever occurs when the body reacts to substances in the air, causing symptoms such as sneezing, a runny nose, and itchy, watery eyes. Left untreated can lead to more severe complications such as asthma or sinus infections.

Hay fever (pollen allergy) is a hypersensitivity of the immune system to proteins from certain plant pollen. Read more about hay fever.

Commonly searched diseases

Diabetes, high blood pressure, and herniated disc – are three diseases that have made a career as so-called diseases of civilization in recent decades. The most common conditions can be found here. If the disease you are looking for is not listed, take a look at our list of Diseases:

Important disease groups

Would you like comprehensive information on specific disease groups? About cancer, mental illnesses, food intolerances, or allergies? Here you can find out what characterizes these clinical pictures, which diseases belong to them, and what symptoms you can recognize them from.

Frequently Asked Questions (FAQs) on Diseases

What is a disease?

There are many definitions of disease, but in general, it can be defined as an abnormal state that affects the body of an organism. The disease is often used interchangeably with illness, but illness usually refers to disease symptoms, while disease refers to the actual cause of those symptoms. The disease can be caused by various things, including infections, genetic abnormalities, and environmental factors.

The 10 most common and frequent diseases

  1. Cardiovascular disease (Heart disease)
  2. Obesity
  3. Diabetes (Diabetes mellitus)
  4. Cancer
  5. Asthma 
  6. Cavity (Dental caries)
  7. Chronic obstructive pulmonary disease (COPD)
  8. Flu (influenza)
  9. Liver diseases
  10. Stress

What are the types of diseases? That affect humans

  1. Oncological disorders
  2. Infectious and parasitic diseases
  3. Blood diseases
  4. Immune system diseases
  5. Endocrine diseases
  6. Mental, behavioral and developmental disorders
  7. Diseases of the nervous system
  8. Ophthalmological and vision diseases
  9. Hearing diseases
  10. Cardiovascular diseases
  11. Respiratory diseases
  12. Diseases of the digestive system
  13. Skin diseases
  14. Diseases of the genitourinary system
  15. Congenital diseases and chromosomal abnormalities