This is probably an allergy to sand flea bites which is called papular urticaria. It is very difficult to treat but your son will grow out of this allergy. Apply calamine lotion to the rash. Also give him Thiamine tablets 12.5mg daily for 3 months. This is a quarter of a 50mg tablet which you can crush and put in a little honey on a spoon. Speak to your pharmacist.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.