I really need help with my horrible skin.?

I have these small red bumps on the backs of my legs that are flat but are 100% noticeable in the light and they make me not want to wear shorts. I also have KP that i have tried exfoliating for a few weeks now but they just break open and I bleed. They're just so disgusting! I'm not able to go outside and enjoy my summer with family and friends because of how my skin looks. Then I have to hide it in school and when people see it they're like your skin is messed up and ****! FML. I really need help.