My son of 14 months has been getting rashes and hives on and off for the last 4 months and we have tried everything from alopathy medicines to homeopathy , but in vain. Assuming it is due to certain food allergies , we have stopped feeding him milk & its by products, meat, fish, carrots and any ready made food (biscuits, etc.,) How long should we wait till this is over. Can you please suggest any investigations we should do? At the moment 10 drops of fenistil syrup seems to help. But can we give this on a regular basis, i.e. 3 times a day @ 10 drops continuously for 3 - 4 days and on weekly intervals?