You'd better go to see doctor as you don't know whether he or she has got the flu or only nasal allergy. My son has the same problems since he is 5 1/2 months. I totally saw 6 doctors and took medicine continuously until he is 8 1/2 months. Finally I brought him to see a herbalist and found out that his flu has not been cleared. After taking Chinese medicine for 4 days, he can sleep well and never cry at the midnight.