Hello,
It can be dermatitis (atopic, contact, allergic), heat rash or excessive sweating causing sweat dermatitis.
You may try calamine lotion. You should also maintain hygiene and try to keep the area clean and dry, wear loose-fitting cotton clothing. Also use an antibacterial soap or mild soap like dove.Avoid deodorant / cosmetics. You can also use a barrier cream with zinc oxide paste or petroleum jelly applied directly to wet skin after bathing.
If the symptoms persist then it will be best to get it evaluated from a dermatologist.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Hello hope you are doing well.
A rash in the genital area could be caused by irritation of the skin from any source. An allergic reaction seen in contact dermatitis could also give rise to a red rash. Yeast infection may cause a rash in the moist skin folds of the vaginal area. In yeast infections there will be cheesy white discharge seen. Fungal infections can also cause rashes and itching. These are only a few possibilities. A clinical examination by a doctor will help in determining the cause. Treatment will be specific for the cause.
Best luck and take care!