gynecomastia surgery

I had an excisional biopsy at the beginning of Oct. The biopsy came back neg and the dr told me it was gynecomastia. Since the surgery, I have had to have the area drained, and possibly need it again, it still hurts, it swells and now, is forming a scab over the nipple. I don't want to call my doctor is it is isn't really necessary...can someone tell me if it does need to be treated or this is normal healing process?

Thank you