Hi Dear, Welcome to HCM. Understanding your concern. As per your query your son have reoccurring throat infection which is because of poor immunity of body and left over infection. Sometimes infection stay in body and give symptoms again and again. I would suggest to eat proper and healthy diet , add fresh fruits and green leafy vegetable to your diet to increase your immunity . Consult ENT specialist for proper diagnosis and to check if there is any underlying condition like allergy is there . Doctor may prescribe anti histamine drug along with antibiotic medication or multivitamin supplement to boost immunity . For now do warm saline gargles twice a day regularly. avoid oily and sharp food substances. Drink plenty of food. Hope your concern has been resolved. Get Well Soon. Best Wishes, Dr. Harry Maheshwari