Hi, thanks for writing to HCM.
Both your symptoms of bruise
and pain in the arm are possible complications of Naproxen
There is nothing to panic about the condition as it will resolve with the following measures -
* Use a snugly fitting elastic compression bandage around the bruised area to limit the further spread
* Ice pack the affected area as it will cause vasoconstriction
and limits the bruise
* Use simple analgesic
to resolve your pain
* Rest the arm and avoid activities that causes pain
If your symptoms are not resolving , consult your treating doctor for further management.
Hope this information is helpful. Good day