RUB WITH ALCOHAL
I do alot of alchohal rubbing, and also I often put a thin coating of tinactin. I've had bruising for up to 7 days depending on circumstance. Somthimes it's my right leg more than my left others it's my left more than my right.
Alcohal rubs will usually fix it within 3-4 days
you can try mixing it in two syringes, and giving yourself a shot in each leg that will also make it less painful.