Itching, swelling, and redness in the genital area are often due to a fungal or other skin infection, but Clostar-S ointment is not recommended for use on your own in this sensitive area because it contains a strong steroid that can temporarily reduce symptoms but may worsen the infection and cause side effects like skin thinning if used incorrectly. It is safer to keep the area clean and dry, wear loose cotton clothing, and avoid irritants. For relief, a simple antifungal cream (if it is a fungal infection) may be more appropriate. It is best to consult a doctor to confirm the cause before starting treatment. If symptoms persist, worsen, or are associated with discharge or pain, seek medical advice for proper diagnosis and safe treatment.