hi. Seems itching is due to chronic fungal infection
plus their might also be an element of ingrown hair caused by shaving.
Use a depilatory cream instead of shaving.
Use Canesten-s cream twice daily.
Take oral fluconazole
once weekly for 4 weeks.
Wear loose fitting cotton undergarments.
Get our blood sugar tested.
Pigmentation will take some time to go on its own