Hello,
Thank you for posting on HCM.
It seems you are suffering from
Tinea cruris and corporis, a kind of fungal
infection.
I usually recommend proper course of oral anti-fungal drugs like Fluconazole or
Itraconazole along with anti-fungal cream like luliconazole for local application at bedtime. You can additionally use antifungal dusting powder containing
sertaconazole during day time and a soap containing
ketoconazole for rinsing of affected areas. Take oral antihistaminics for itching as required.
Dont worry about the darkness in the affected area, it will resolve on it own once
fungal infection is completely treated.
Maintain hygiene over those areas and avoid wearing tight undergarments.
Hope your queries are resolved and wish you best of health.
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http://doctor.healthcaremagic.com/doctors/dr-hardik-pitroda/67169
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Thank you
Dr Hardik Pitroda