How To Reduce Itching Sensation On Lower Belly And Kneecap?

I m a Sr Citizen (76+). For the past six days I get an ITCHING SENSATION and scratch during the late evgs & nights, resulting in the red-colour, with more itching .. this attack is on the lower-belly & back-side of the knee-cap, i.e. the soft skins are the targets. A family dr. & friend suggested this DERMADEW OINTMENT/GEL, but the users experiences & review SCARE ME VERY MUCH !! In my humble view, it s a simple ALLERGIC DERMATIS and not even ECZEMA of a serious nature .. Apart from the side-effects, a 50-g tube costs around Rs 155 that is exorbitant .. Kindly suggest a SIMPLE OINTMENT THAT WILL NOT HAVE BAD EFFECTS ON THE SKIN. Thanx in advance .. Raman Muthuswamy from Bangalore India .. IF FOR YR ANSWERS, I LL BE CHARGED .. I AM NOT INTERESTED IN YR SERVICES ..