My daughter now aged 3.5 also had this problem lasting for about 1 year. I tried many different methods like eating vegetable, organe, changing milk powder, see doctors (both chinese or western), making different chinese herb for her. Chinese doctor make some chinese herb which can solve the problem but my daughter did not like to drink becasue of the tasty. Finally I found I seldom to make 開奶茶 since she was aged 2. So I make for her because she still drink milk powder 3 time a day. Now the problem has been solved.
我鐘意你同我講 I Love U, I Love U Too!
You are the sunshine of my life. That's why I'll always stay around. You are the apple of my eye. Forever you'll stay in my heart.