My 6 year old grandson was just told this week that a similar line on his nose, thin white horizontally a little above the nostrils is an indication of allergies. The doctor has prescribed 2 over the counter allergy medications, 1 for 2 weeks and one for a month. I was looking for more information myself on this since this was the first time I ever heard of this. Does anyone else with allergies have this or had a different explanation for the line?