I popped a pimple and it dried up in a day and now there's a scab on my forehead. i use the 3 step benzac (benzoyl peroxide) acne solutions as a face wash.

Keep clean: washing over the scab gently. Avoid removing the scab as this will probably result in bleeding and delay healing. In the future, avoid popping pimples. There is an antibiotic ointment called Metrogel which can help prevent the development of pimples by applying it twice a day as soon as you feel a pimple starting to develop. Consult a physician about Metrogel & other medical treatments for acne.