Hello, Welcome to HCM, The symptoms are suggestive of fungal infection and the location of these rashes are evident of tinea versicolor. These lesions will be associated with itching and it is more common during the summer season as it is known to grow in wet and moist area. As you are having the classical symptoms of tinea versicolor, i would suggest you to follow 1.Keep the area dry and clean 2. Personal Hygiene 3.Topical Antifungal cream like Ketaconazole 4.Oral Antihistamine. These measures will be improve the condition and reduces the symptoms. Thank you..