Strange Bruising After Benching

This is kinda wierd and was hoping you guys could tell me a little more about it… for the last month or so i’ve been getting a series of small bruises right below my colar bone after benching… its much higher than where the bar hits my chest so its not that. I should also probably mention that over the last few months my bench has gone up signifigantly. Probably nothing serious, i’m asking more out of curiousity.

Could be minor tears. Other than that, no idea.
The skin is thin there, so they could show through prety easily.