From the picture and history, this looks more suggestive of a fungal infection (tinea) or chronic friction-related dermatitis rather than anything serious.
Keep the area dry, avoid scratching, wear loose cotton clothing, and continue antifungal treatment regularly as prescribed because these infections can take a few weeks to improve completely.
Next Steps
Feel free to book a consultation so we can discuss the complete treatment plan in detail
Health Tips
Avoid using steroid-containing creams without medical advice.