It's Fungus or yeast 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 by sending photos.

You require check up (as it can be many reasons like fungal infection, etc) and cream prescription Kindly contact a doctor online or in person

Take online consultation

Take online condultation

I can understand your concern Get online consultation for proper guidance and treatment

Take consultantion and discuss in detail

Hii.. It can be frictional Dermatitis or fungal infection or other problems.. Need to be treated correctly to prevent further spread Need complete evaluation and history for accurate diagnosis, After that  correct treatment options can be provided Use calamine lotion for now So kindly consult on-line for further evaluation and prescription

Consult online for further treatment

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.