Eczema is a term for several different types of skin swelling. Eczema is also called dermatitis.
It is not dangerous, but most types cause red, swollen, and itchy skin.

Amenorrhea is the medical term for the absence of menstrual periods, either on a permanent or temporary basis.

An allergy is a reaction of your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one thing.

Diarrhea means that you have loose, watery stools more than three times in one day. You may also have cramps, bloating, nausea and an urgent need to have a bowel movement.