Hii, As per the history it looks like fungal infection. Persistent and recurrent infection is due to incomplete treatment.
Sweat and humidity will aggravate fungal infection.
Next Steps
Avoid using dermi5, as it contains steroid, will aggravate the infection after stopping it and causes permanent damage to the skin.
Health Tips
Keep area clean and dry.
wear loose cotton clothes.
consult dermalogist for proper treatment and complete the course to prevent its recurrence.