It seems that, the lesions you described would be impetigo
It is bacterial infection..mostly caused by staphylococci.
Poor hygiene,poor immunity,immunocompromised condition,anaemia
..etc may precipitate the disease.
Blood tests may be done to rule out any internal disease.
Apply antibiotic cream.
Take antibiotic and anti inflammatory drugs...
Immunobusters may be taken.
You may consult dermatologist
for perfect treatment.
I hope you got my answer.
Dr. Ilyas Patel MD