Welcome to HCM.
It is due to mixed infection.(bacterial/fungal).
Infection spread to upper thigh and anus due to severity.
It usually occurs due to improper hygiene after unprotected sex.
Avoid tight under garment,take proper local care,use medicated soap to clean.Avoid sex till get complete cure.
Start local clindamycin with anti fungal cream.use vaginal tablet containing tinidazole,clotrimazole
and lactic acid bacillus to get faster relief.
Start complete course of oral antibiotic like oflox/ornidazole,moxifloxacin
oral anti fungal like fluconazole,itraconazole
or terbinafin will be helpful.
Consult gynecologist for better guidance and perfect medical management.