The weather is hot, I sweat a lot, I have red spots on my body, and I feel itchy when I get hot.

Problem analysis:

The sweat spots you mentioned are caused by fungal infection. It is a superficial fungal infection and generally requires antifungal treatment.

Opinions and suggestions:

It is recommended to use topical ketoconazole lotion for bathing at least three times a week. Terbinafine ointment should be used for external use twice a day. Apply the water first and then the ointment.