never bruised before...this is the first time ive done bicep shots...and i always get nasty bruises...every where else, im gravy...biceps = dead giveaway....except one day i did an experiment...dont kno if this is significant...but in my left bicep 75mg tren a....right bicep 100mg prop...tren bicep didnt bruise...prop bicep did...maybe cuz i had to hit it with my left hand...but who knows...the hussie is starting to question shit..