I had a nurse who pushed phenergan (promethazine) in my hand and it burned so bad now my hand still feels bruised and my vein is hard. how long will this last?

Too long. Get seen!: One of phenergan's black box warnings is severe tissue injury to injected areas due to chemical irritation and tissue damage which causes burning, pain, thrombophlebitis (clots in little veins) and tissue death in the local area injected. If you still have a hard vein and the burning pain is continuing, you should have it checked out by a physician. Some cases need minor surgery to treat.

Thrombophlebitis: Superficial vein thrombophlebitis is a common inflammatory-thrombotic process that may occur spontaneously or as a complication of medical or surgical interventions. The goals of treatment are to reduce pain and inflammation and prevent complications. Anti-inflammatories may help. Superficial thrombophlebitis is usually a short-term condition that does not cause complications. Infection or evidence of deep vein involvement increases concern.