 [ Symptoms ] what is this itchrash that appears on the head of my penis after oral sex  i have seen a dr regarding the rash and itching and was prescribed cream to treat yeast infections this does solve the problem however this happens every single time i receive oral sex i am trying to figure out what the root cause of this wouldcould be as i suffer great discomfort for the several days that follow [ Disease ] i need to do full lab tests cbc rft lft u need also to do ecg and echo serum electrolytes random blood sugar lasix can worsen the condition if it kidneys r not working well