Looks like fungal infection , superficial fungal infection of the skin caused by dermatophytes (most commonly Trichophyton species). It's called "ringworm" due to the characteristic ring-shaped rash, although no actual worm is involved. And your dark vagina issue. Maintain good hygiene, Avoid sharing personal items like towels or clothing, Keep skin clean and dry.. It will require treatment with ointments and medicines so it improves and color skin tone also improves.

Fungus  infection....common around skin folds like thighs and genitals.. avoid sweating, sharing clothes,towels and soap.. specific medicine required depends on the severity.. for detailed prescription do direct online consultation

Don't worry, specific medication will cure condition. Kindly consult online for detailed prescription and guidance.

No need to worry.specific treatment is available.it depends on severity of the disease . Complete medical history is required.. Pls do online consultation with Dermatologist for detailed prescription & guidance.