When a baby’s eyes suddenly become red, the first reaction of many parents is “pink eye”. However, the ophthalmologist reminded that red eyes may not always be red eyes, parents can simply screen from eye droppings and other symptoms, it is best to go to the hospital to let the doctor to diagnose. The treatment for red eyes varies greatly from one cause to another, so parents should remember not to buy eye drops for their babies at will. Below, let’s take stock of the most common causes and countermeasures that can cause redness in babies’ eyes. A, acute conjunctivitis – eye stool is very much and purulent The most common cause of red eyes in babies is acute conjunctivitis, which is often referred to as “pink eye”. If your baby has acute conjunctivitis, in addition to the symptoms of conjunctival congestion (i.e., red eyes), there is also a lot of purulent discharge, and the eye stools are yellow in color. Especially when waking up in the morning, there is so much discharge that it is difficult to open the eyes and you need to pick them open with your hands. However, the baby’s vision will not be affected. If your baby has the above symptoms, parents can recall if your baby has had a cold, or has gone swimming, or has rubbed his eyes with his hands and other unclean eye behavior. If so, it’s probably acute conjunctivitis, so it’s best to take your baby to the hospital for diagnosis and treatment. Response: If the diagnosis of acute conjunctivitis is confirmed, the doctor will usually prescribe antiviral eye drops for your baby. After going home, your baby’s daily care is also very important. Because acute conjunctivitis is contagious, babies should use separate washcloths and washbasins, and washcloths should be exposed to sunlight or disinfected with UV lights after use. Parents should remind their babies to wash their hands regularly and not to go to kindergarten or school during the illness. The second most common cause of red eyes in babies is allergic conjunctivitis. In addition to causing conjunctival congestion, allergic conjunctivitis may also cause itchy eyes. Some babies will have a discharge from their eyes that is elastic and stretchable, much different from the purulent discharge of pink eye. If you look under a slit lamp, many babies can see follicles of varying sizes on their conjunctiva, sometimes as many as paving stones in a dense mass. In addition to eye discomfort, some babies also have symptoms of allergic rhinitis such as runny nose, nasal congestion, nasal itching and sneezing. Therefore, some people also call it “allergic rhinoconjunctivitis”. Allergic conjunctivitis is an allergic reaction to the conjunctiva caused by exposure to allergenic antigens. Allergens such as pollen, dust mites, molds, animal dander, and some foods (such as seafood) can also cause allergies. Response: If your baby has allergic conjunctivitis, your doctor will usually prescribe anti-allergy eye drops. If the baby also has systemic symptoms, such as itchy, painful skin, the doctor will also prescribe oral anti-allergy medication. In daily life, parents should pay attention to the baby to avoid allergens, such as the baby is allergic to animal dander, then the family should avoid pets. As your baby gets older, the immune system will become more developed and these discomforts will change or even disappear. Iridocyclitis – eye pain, vision loss, tearing, photophobia Iridocyclitis, also known as uveitis, is one of the causes of redness in babies’ eyes, although it is not as common as the first two diseases, but it suggests that the baby’s immune system is low or has other diseases that should be taken seriously by parents. Iridocyclitis is an inflammatory disease caused by bacterial infection. In addition to eye redness, babies often have eye pain, decreased vision, tearing, photophobia, and high intraocular pressure. Our eyes are not sterile, they have normal flora that can become pathogenic and cause infection when the baby’s immune system is low. Therefore, if your baby is diagnosed with iridocyclitis, it is a sign that he or she may have a low immune system and it is important to find the cause of the immune deficiency and intervene at the root. In addition, some other systemic diseases may also cause iridocyclitis, such as acute lupus erythematosus, dermatitis, polychondritis, ulcerative colitis, and leukoaraiosis. The doctor may ask the parents in detail if the baby has diarrhea, any mouth ulcers, or even examine the baby’s whole body skin or prescribe more tests. Response: If the baby has a significant inflammatory response, the doctor will usually prescribe eye drops containing hormones as well as anti-inflammatory and analgesic eye drops. The baby’s pupil will also be dilated to prevent adhesions and the formation of a plum-shaped pupil. If the intraocular pressure is high, pressure lowering will also be performed. Severe symptoms may even require oral hormones.