Scabies probably does the itching is also present over face and scalp??
In case of scabies u can apply permethrin cream overnight 1 day and wash the clothes u wore with hot water and discard the soap u have been using previously
Apply a suitable ointment containing Clobetasol propionate+ornidazole+fluconazole.Take Levocetrizine tablet twice,one after breakfast and one after dinner.Wash all your wearings in very hot water,adding a few drops of Dettol or antiseptic solution.Also,you have to maintain proper hygiene by not letting sweat formation in these areas for a long time.