 [ Symptoms ] i had sex about 12 hours ago and i am noticing a small patch of skin with redness in blotches but no pain nor pus no puss no burning or tingling feels flat like my skin no lumps or bulge right above penis [ Disease ] it looks like kidney problems you should consult a nephrologist and get evaluated and a proper renal profile gfr and bun ratio should be done for confirmation of the exact cause and treatment can be done hope this helps