ExpertDr. Pandurang sawantPaediatrician4 years agoA. For this type of patches  need to examine ur baby throughly. 
And also rule out that these are since birth or after that. 
If not since birth then 
These patches  may be allergic or infective(fungal or becterial)  in origin. 
Need to examine ur baby 
Visit ur nearest pediatrician 
He will examine ur baby and guide u in a better way.    
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Kalindi BhavsarMom of a 8 yr 4 m old boy4 years agoA. Hi mom 
It may be due to some allergies or nutritional deficiency 
Give adequate food 
Give adequate water 
Take a good care of your baby 
Burp well after every feeding 
Apply coconut oil or olive oil give ultra D3 drops and calcium supplements 
Give healthy protein rich nutritious food 
Burp well after every feeding 
Consult with your doctor once for proper medical examination and treatment
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