My son, who is 20 years old, gets cold in the morning and starts sneezing continuously. This will persist for about two hours and goes off its own. At the same time this not an everyday problem, it happens once or twice in a week. But if look at non-LED electric light immediately after getting up in the morning, he definitely gets it. Some doctors suggested me that it is allergy of light, but so far none could suggest any remedy for the same. Of late I started feeling that he gets it when the claimant is more humid. Can you tell me what the problem is and what the remedy is?