1.Why do the symptoms of babies with habitual squint recur? Many parents have encountered this problem, which is mainly related to the baby’s incomplete gross motor development and poor balance. There are mainly the following situations: (1) large motor development such as gaining independent gait (just walking but walking unsteadily, just sitting but sitting for a short time, easy to fall down, etc.); (2) growth spurt; (3) fatigue (for example, tired of getting up in the morning, or tired of playing, sitting, watching); (4) infection or other diseases (fever, diarrhea, etc.). Parents do not need to worry too much when symptoms appear repeatedly, they should pay attention to strengthening the posture fixation and strength exercise, patiently correct, generally half a month to a month’s time, will gradually improve. 2.How to check the sternocleidomastoid muscle? At home, you can make a basic judgment on the condition of the sternocleidomastoid muscle. First, set your baby’s head straight and observe with your naked eye whether there are any differences between the two sides of the neck (e.g. one side is obviously raised), from behind the ear to the clavicle. Next, touch the sternocleidomastoid muscles on both sides at the same time with both hands and squeeze them to see if they are equally soft. Again, turn the baby’s head to the left and right respectively and observe if there are any striated protruding muscles. Generally speaking, the neck is soft and the baby who will not lift and erect his head is flat; the baby who will lift and erect his head more steadily can see a protruding muscle that extends from behind the ear to the clavicle, and compare the size and shape of both sides to see if it is the same. Finally, feel and press the two sides with your hands to see if they feel the same. If all aspects are the same, it proves that there is basically no problem with the muscle, and it is good to correct the posture and habits at home. Of course, the most professional judgment can go to the hospital for consultation. 3.Interesting sternocleidomastoid muscle? Why is it interesting? In the case of sternocleidomastoid muscle, there are two opposite manifestations of the disease. In the case of myotonic squamous neck (lumpy or non-lumpy), the muscle on the affected side becomes contracted and hardened, just like a rubber band losing its elasticity, and no matter how much external force is used, the baby’s head cannot be turned or lifted incorrectly. The side of the head is like being pulled by a steel band, uncomfortable and unable to move, so you want to take a knife to cut the muscle. In the case of habitual squint, the sternocleidomastoid muscle on the affected side is short, soft and weak, not full, and it looks as if it is concave, without muscles, but with the help of external force, it can be turned, but it is unable to lift itself. The healthy side can feel a broad and plump and elastic muscle, turning the head freely. This time, do not think that the side of the broad and plump, turning the head can see a meat is a problem, on the contrary, that is the baby’s head and neck strong, moving freely after the development of strong muscles.