This inflammed lesion,which attacks the extremities in particular,is caused by cold but in children it indicates certain vitamin deficiencies,particularly vitamin D.
A homeopathic remedy which in this case is clearly indicated.
Agaricus 6
Symptom : red and swollen the extremities attacked are the site of sensation of burning and itching as if they had been stabbed by thousnds of icicles.
Dosage 3 granulesthree times a day between meals.