I have had this irritation on my hand for a few weeks. Its first started as little itchy red bumps now its a big red blotch that itches when I wash my?

Hard to say. Difficult question without a picture, but hand eczema can look like this and is common. Usually pretty itchy but can get painful if there are cracks or open skin. Treatment is topical mid potency steroids and avoidance of irritants.