Skateboarding problem?

its summer so i skate with shorts on and i hit my legs bellow the knees like my shins and it hurts like @#$% and it happens like all the time, i always hit my shins i have bruses over bruses and over bruses and over bruses, i even developed a dieseas from skateboarding called OSGOOD SLAUGHTER , i have to wear i knee brace and when i whear jeans i wear shin guards underneeth so no one can see, then i get all sweaty and my weiner starts to itch like every #$$%%^& second and my knee brace slips off and the impact hurts when i tighten the brace i loose circulation in my leg, please i dont now what to do i love to skate and im almost done making my sponser me vidoe for my local skateshop, i dont want to give up skateing someone please help me!!!!