Anabolic steroids are often used illegally to build muscle. But corticosteroids are used to treat a variety of health problems. Learn more about steroids.| medlineplus.gov
Your immune system is made up of cells, tissues, and organs that fight infections and diseases. Learn how it works, and about diseases of the immune system.| medlineplus.gov
Hives is a skin rash that can cause the skin to be red and have itchy bumps. Learn possible reasons to have rashes and treatments.| medlineplus.gov
Passing gas can be embarrassing. But everyone does it. Find out the causes of gas and how to control burping and flatulence.| medlineplus.gov
Eczema is a general term for different types of rashes. Atopic dermatitis, the most common type, is an allergic skin reaction. Read about treatments.| medlineplus.gov
Coughing helps your body heal or protect itself. There are two types of coughs: acute and chronic. Learn the causes of chronic cough.| medlineplus.gov
Get the facts on symptoms, causes, and treatments for dizziness. Know how dizziness differs from vertigo, which is feeling that the room is spinning.| medlineplus.gov
When you have breathing problems, such as shortness of breath, it's hard for you to take in the oxygen your body needs. Find out what can cause this.| medlineplus.gov
You call it barfing, puking, or throwing up; your doctor calls it vomiting. Read more about nausea and vomiting and the conditions that cause them.| medlineplus.gov
Diarrhea can range from mild to severe and can be dangerous in children. Find out what you can do to treat symptoms and when to call your doctor.| medlineplus.gov
An allergy is a reaction by your immune system. Substances that cause reactions include pollen and food. Find the full list of allergies and symptoms.| medlineplus.gov