Hi,
It seems that this may be due to some allergy causing problem.
Take some anti histamine and apply calamine lotion on the affected parts.
If you do not get relief, consult dermatologist and seek his advice.
Hello,
If they had been due to chiggers, the sores would have been itchy as well. If the sores are painful then any bacterial infection needs to be ruled out for which you should consult a dermatologist and get a bacterial culture as well as biopsy skin done to confirm the diagnosis. If bacterial infection is confirmed, then you may need a course of antibiotics.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.