One possibility for such kind of lesions could be boil or carbuncle. A boil, also referred to as a skin abscess, is a localized infection deep in the skin. A boil generally starts as a reddened, tender area. Over time, the area becomes firm and hard. Eventually, the center of the abscess softens and becomes filled with pus.
Apply warm compresses and topical antibiotic cream on the boils like Mupirocin or Bactroban.If the symptoms persist then oral antibiotics may be needed.I would suggest a dermatologist’s consultation then.Also get your blood sugar levels estimated as recurrent boils are found in diabetes.
Hope it helps.Take care and pls do keep me posted if you have any additional queries.