Hi,
This could be dermatitis , eczema or allergic skin reaction to some unknown substance.
Are you allergic to any specific substances? Have you taken any medications for the lesions?
You should keep the areas clean, use a powder to keep the areas dry , use calamine lotion at the sites. Oral antihistamine medications would help if the lesions are itchy.
If your symptoms persist it would be best to consult a skin specialist because nothing can be said with surety without having a look at the lesions.
Let us know about how you are doing and if you have any other doubts.
Regards.
look up eczema. That what it sounds like. Try Emu oil or over the counter creams like sarns. This is a condition that comes and goes seasonally. Sometimes it is triggered by things like sweat or certain foods. You will need to apply ointment two to three time a day.