It is difficult for me to be sure about your baby's rash without being able to see her. Her rash may well be due to insect bites especially due to sand flea bites which can cause itchy pimples which persist for weeks to months. What concerns me is that you mention that your baby's feet are also affected and this is rather unusual with flea bite allergy. This is more likely to be due to a skin condition called scabies which is due to a mite getting into the skin. Please ask a paediatrician to see your baby and get a definite diagnosis.
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