What causes white bumps and itch on feet?
Have a look at scabies, seems the most likely without more information.
White bumps on your elbows may be the start of psoriasis. If the bumps are raised, rough like a callus, and itch or shed skin cells than it is most likely psoriasis. There are many decent treatments you can get over the counter you can test out, and recently my boyfriend has found that taking choline severly reduces his psoriasis.
Bumps may form after a caterpillar has crawled on the skin. The bumps may go away after 3 to 5 days. If the bumps itch, a good home remedy is to apply any stick deodorant to the affected area when it starts to itch. A person should seek medical attention if the bumps appear in the form of blisters or turn a bright red.