Is there an allergy prick test for eczema?

No. Eczema is diagnosed by examining the patient and taking a history. Allergy prick testing may be helpful in treating eczema, but is not necessary. Allergy testing by skin prick or blood test always needs to be interpreted with careful attention to the patient's history and symptoms. For example some patients may test mildly positive for milk allergy, but can drink milk every day without problem.