Hello,
The symptoms are suggestive of
boils.
Boils may be due
to poor personal hygiene or minor trauma
to the skin allowing bacteria
to invade, use of antiperspirant deodorants, use of strong drugs which may hamper the immunity or a diabetic patient. Warm compresses may help, antibiotics are used sometimes, good hygiene, no picking or compressing and zinc supplements may help. You can use topical antibiotics like Bactroban.
If the symptoms persist then please consult a dermatologist.