Hello I appreciate your concern This could be due to allergy or a viral infection I would like further information to guide you better is she running fever? Is she taking proper feeds? Viral infection takes a week or so to recover completely In my opinion you should consult a paediatric doctor for adequate doses of T mimic and other substitute if need be. Give her feed regularly and at frequent intervals you should give multivitamin supplements If she is running fever than she may require a course of antibiotics after a battery of tests Hope this answers your question Best wishes