Shingles, also called herpes zoster, is a painful skin rash that is caused by the reactivation of the varicella zoster virus, the same virus that causes chickenpox.

Sulfites are commonly found in various foods and drugs. “Sulfites” is the general name for six specific substances, which are: sulfur dioxide, sodium sulfite, sodium bisulfite, sodium metabisulfite, potassium bisulfite, and potassium metabisulfite.

Cosmetics can help women feel on top of their game, but they can also cause irritation especially on sensitive skin. According a dermatology study published in 2010, more than a third of over 900 research participants had at least one allergic reaction to cosmetic ingredients. 

Genital itching in men and women can be caused by skin irritation, sexually transmitted diseases, and allergies. Read on to find out more.

A wood allergy is a reaction by the immune system caused by chemicals called quinones.

Pemphigoid gestationis (PG) is a rare, itchy skin eruption that occurs in the second or third trimester of pregnancy. The affected area of the skin shows itchy red bumps or blisters and plaques on certain parts of the body.

The term human seminal plasma (HSP) refers to the components of human semen other than spermatozoa. Allergic reactions to HSP is called seminal plasma hypersensitivity or sperm allergy. This condition is more common among women, affecting up to 40,000 women in the U.S.

Polymorphous light eruption, also known as polymorphic light eruption (PMLE), is a common skin reaction to sunlight that commonly occurs in people with fair skin.