What Does White Pimple Like Substance On The Penis Head Indicate?

Yes I have several white pimple like things underneath of my penis head on the back side some are spread out from each other and some that are close to each other not clusters though. They are also on shaft and again they are spread out none are clustered together. They are hard and I have popped a few and they have a hard inner core they don t have any puss and around the white head is not red or colored in any way. Once the core comes out they bleed quite a bit for being only the size of the head of a pin or needle. Have had only one that was bigger then rest it was about the size of two put together. Would like to know what you think they might be and if I need to go to the dr. I also work out in the heat all day In blue jeans I wear loose boxers and have got a rash beneath my sac on the inner thigh of both legs. It s red and bumpy and it s only wear my legs rub each other once my boxers and pants are wet from sweating would like to know if it s a heat rash or if it could have anything to do with the tiny solid white pimple needle sized bumps. Thank you would like to know asap plz