What Self Treatment Do You Reccomend for Hematoma After Breast Reduction of 4 Weeks?

Hematoma at 4 weeks post-op is unusual. If it is not enlarging, looks more like a bruise, and the incisions are healing well, I would observe only and wait for it to resolve. If there is any underlying fluid collection, it should ideally be drained. I would protect the site, and limit activity (no exercise) to speed resolution. I would also recommend wear of a lightly compressive, yet comfortable bra. 

The best thing that you can do is to avoid any aspirin, ibuprofen, or naloxen containing anti-inflammatory medications.  Acetaminopken is finr, but the others will increase your chance of bleeding again.  Also, avoid any herbal supplements, and any anticoagulants ( warfarin, heparin, etc.)  Most of the time, a small enough hematoma will resolve on its own.  I hope this helps.