This skin condition causes a rash is thick and scaly and usually appears on the knees, back, elbows, genitals, and scalp. It is permanent and can be passed down from your parents. The cause of a rash may be difficult to identify on your own because rashes may present as splotches, bumps, or blisters.

Understanding the Context

They can be itchy, scaly, and red, and some may look different on ... Allergens usually cause a shiny, blistered, itchy rash, while irritants tend to cause a dry, scaly, less itchy rash. It can appear hours to days after exposure. A rash is an area of skin that is irritated, inflamed or swollen.

Key Insights

Rashes can occur due to various causes. Discover 36 common skin rashes. Learn more about when to worry about a rash in adults and whether immediate medical care is necessary. Reviewed by a board-certified dermatologist. Different skin rash types include eczema, psoriasis, and shingles.

Final Thoughts

Treatment depends on the cause and may include medications or lifestyle changes. There are many types of rashes. Causes of a rash include contact dermatitis, viruses, and autoimmune conditions. This article provides images to help identify a rash. Overview What is a skin rash? A skin rash occurs when skin becomes red, inflamed and bumpy.

Some skin rashes are dry and itchy. Some are painful. Many things can bring on a skin rash, including viruses, bacteria, allergens and skin conditions like eczema.