Babies often have heavy, yellow and sticky eye droppings, which are not relieved even though parents give them plenty of water and less oily and stimulating things in their diet. So what is the cause of excessive, yellow and sticky eye stools in 4 year old babies? The following is an introduction. 1, may be infectious conjunctivitis: when the baby has a fever, cold, easy to appear more eye stool, yellow color, accompanied by the phenomenon of lacrimation. This is mostly due to upper respiratory tract infections caused by bacteria, Chlamydia trachomatis or viruses that infect the conjunctiva or cornea of the eyes when the child wipes his nose or coughs and rubs his eyes. 2. Possible allergic conjunctivitis: Children are often exposed to a variety of substances in nature (such as dust, dirt, animal fur, pollen, chemical fabrics, etc.), which can easily lead to allergies and cause conjunctivitis, called allergic conjunctivitis. That is, the eye surface mucosa to the air suspended in the special allergen particles caused by allergic reactions. 3, may be on fire: When autumn and winter come, the air is dry plus comes heating, the house is not well ventilated, parents overdress their children, because the children’s immune system is not yet well developed, the body temperature regulation center is fragile, many children appear more eye stool, dry mouth, red tongue, thick tongue.