What is this rash on the back of my knee and inside of my elbow?

Eczema. This is typical of eczema and will respond to prescription cortisone. An exam might reveal something else. OTC hydrocortisone is usually not potent enough but no harm in trying.

Related Questions

My 4 yr old son suffers from itching, rashes and redness after every 7-10 days behind his knees & back of his thighs, hips and elbow joints?

Eczema. Those areas are the common place of eczema in children. You can try over the counter Hydrocortisone cream a few times a day. Use a lot of moisturizer and visit a local physician if it does not go away. Read more...
Atopic dermatitis. Atopic dermatitis is an itch that rashes (as opposed to a rash that itches) - it's the itching that comes first, and scratching it that causes the rash. The itchiest areas are typically the areas you listed, although other areas can be involved. Most kids outgrow it, although an unfortunate minority do not. Treatment depends on location and severity. A dermatologist can help you with that. Read more...
Eczema. Eczema is a skin problem which causes dry, itchy skin, especially in the areas you mentioned. It can come and go for years. Bathe with plain water, only mild soap as needed, no scrubbing. Pat dry and apply a good moisturizer (no fragrance, thick, not a watery lotion) regularly. If it worsens and causes raw skin, see your doctor. Read more...

My Son (2 years) has rash on just above wrist, inner side elbow and back of knee. It not very aggressive but he is scratching it while he is in sleep?

Rashes in children. It is very hard to diagnose rashes "over the phone" and your best bet is to have it looked at. Eczema is a common offender, as is contact dermatitis including poison ivy or other irritating substance. Read more...

I'm getting rashes behind my knees, my arms near elbows, my stomach above belly button. What could this be?

Eczema. But it could also be dry skin especially during the winter months. Need to lotion up with any moisturizing cream or lotion, you may also need prescription strength steroids depending on the severity. Read more...