A member asked:

Hard, painful lump on thigh after phenergan (promethazine) inj 2 weeks ago.now looks bruised, started out red.best treatment?

A doctor has provided 1 answer

Moist heat: This is not an unusual side effect of intramuscular injection, although quite bothersome for you.I recommend a towel moistened with epson salt water(1 cup salt in a quart of water), warmed and applied to the site for 15 mins every 3-4 hours.It should clear in a day or two.If not better soon seek care!

Answered 3/14/2019

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