What seems acne may be folliculitis. It is infection of hair follicles may be become chronic. You are probably also suffering from what Dermatologist call urticaria. Common causes are food allergy, infection or drugs taken for some condition. It presents with itching resulting in formation of red rashes which we call hives or wheals. Although in most cases cause remains unknown in spite of a thorough search. It can be symptomatically treated with antihistamines so that you do not get any new hives. The treatment should be prolonged until it resolves which usually takes 1 to 6 months. In very few cases like yours it persists for years. But that doesn't mean it cannot be kept in check. Please contact me through online consult option for further details and treatment.