The burning and irritation after applying Derobin ointment are likely due to a reaction to the medication, as it contains strong ingredients that are not suitable for sensitive areas like the inner thighs, so you should stop using it immediately. Gently clean the area with water, keep it dry, and apply a soothing moisturiser or calamine lotion to reduce irritation; avoid tight clothing and wear loose cotton underwear to prevent further friction. Do not apply any steroid or medicated creams without medical advice, as they can worsen the problem. If redness, pain, or burning persists, or if there are signs of infection like discharge or spreading rash, it is important to consult a doctor for proper treatment and a safer alternative.

You should consult your doctor to get a prescription for topical steroids or vitamin D analogues, which can help reduce inflammation and slow skin cell buildup. Apply fragrance-free emollients or moisturisers daily to keep your skin hydrated. It is also essential to identify and avoid known triggers such as stress, smoking, alcohol, or harsh soaps, as these may worsen psoriasis and cause flare-ups. Regular skin care and adherence to your treatment plan can help manage symptoms effectively.

Derobin cream is not suitable for ringworm, as it contains strong steroid-based ingredients that can worsen fungal infections and make them spread, so you should stop using it immediately. The correct treatment is to use a proper antifungal cream such as clotrimazole, ketoconazole, or terbinafine applied twice daily for at least 2-4 weeks and continued for 1-2 weeks after the rash clears. Keep the area clean and dry, avoid scratching, wear loose cotton clothing, and do not share towels or clothes to prevent the spread. If the infection is not improving or is spreading, you may need oral antifungal medication prescribed by a doctor.