Lumpy hands

Dammit. I've had these lumps on my hands for the past two weeks, I think it's a dermatitis thing but not certain. Anyway in the last couple of days it's spread from the backs of my fingers. Now it's all along my fingers and on the palms of my hands. It's itchy and annoying. I can't grip things properly because it hurts and now it's spread to my fingertips. Grrr.