Hi ,
Baby may be suffering from insect bite,
folliculitis,haemangioma.
You should apply antibiotic like
fusidic acid or mupirocin on the affected skin 2-3 times.
Please visit a good
dermatologist or
pediatrician for proper examination and treatment with prescription drugs.
The symptoms cannot considered normal and evaluation by an expert at the earliest is must.
Hope this helps.
Regards.
DrSudarshan
MD
Dermatologist