I get red itchy bumps on my fingers. they are particularly itchy at night. what's going on?

Pompholyx: You most likely have pompholyx, a common type of eczema affecting hands, fingers, and sometimes feet, also known as dyshidrotic eczema. The cause is not known, but may be related to problems with sweating. It can get infected by bacteria and get aggravated by contact with irritants such as water, soaps and detergents. You need to be evaluated by a physician with a good history and exam.

See your MD: There are several possibilities ranging from hand dermatitis to scabies. See your doctor for examination.