Please read i need answers or help

so me and my boyfriend started having sex recently again after our break up and we have been wearing condoms but he pulled out and there was blood on the inside of the condom WHAT COULD THIS BE !!!????

Update: No im not bleeding at all and he has been to the doctors hes on antibotics for his infection in his arm he got a tattoo and had an allegic reaction but that couldnt be why could it?