It seems that you may be having impetigo
It is a bacterial disease caused by staphylococci.
Poor immunity,poor hygiene,anaemia
,other immunocompromised conditions might lead to such skin diseases.
You should go for blood tests..to rule out any disease which is responsible.
Take proper antibiotics in perfect dose for 2 weeks.
Take antiinflammatory drugs.
Have bath with dettol
Good diet and proper sleep might improve the immunity ..
I think you might improve ..
I hope you got my answer.
Dr. Ilyas Patel MD