First, you can't see organic diseases (such as fractures or congenital, legs are really different in length) or problems caused by the brain.
Secondly, from the perspective, walking means that one leg is long and the other leg is short, but the spine becomes the same length after reduction.
Some time ago, I saw a case in Beijing: a lady in her thirties, when others saw her walking, her right leg was obviously short and her left leg was long, but she didn't feel any discomfort. Occasionally, sleeping at night is not appropriate, and my waist hurts a little. Her muscles are still soft, and she seems to have played sports or danced before. Her film, lumbar vertebrae 4 and 5, obviously leans to the right. I gave her lumbar reduction and told her to go out for a walk. It doesn't look obvious. Then I let her lie on the bed and hit her waist, ass and legs with a stick for more than ten times. Then I asked her to go out for a walk. Her legs seem to have become the same length. Tell her to go back and hold on, as long as the lumbar vertebrae are not dislocated, one leg is not long and the other leg is short.
In the third case, others can't see it, but they feel that one leg is long and the other leg is short. This condition is related to dislocation of thoracic vertebrae.
One of my younger brothers came to me because of illness before she became my younger brother. A 25-year-old girl has studied yoga for several years and is still teaching others to practice yoga. Her muscles are particularly soft, but she feels uncomfortable all over, especially when one leg is long and the other leg is short. She dislocated her thoracic vertebrae in many places. After the first day, the symptoms eased immediately. The next day, the feeling that one leg is long and the other leg is short completely disappeared. After staying here for a few days, I feel normal. Before I go, teach me a simple yoga movement. In less than ten minutes, he said to me, "Sister, I feel that one leg is long and the other leg is short." She had a reduction of the thoracic vertebra and had a dislocation sound. Getting up will be normal soon. Tell her to stop practicing yoga when she gets back, so as not to dislocate.
Let's be clear here, practicing yoga is also good, but it should be based on your actual situation and cannot be forced. Her problem is that she didn't practice yoga until later to exercise, but some movements have become targets, and falling down again and again leads to dislocation of the whole body.
In the fourth case, a hamstring is so muscular that it can't be seen, but it doesn't feel obvious, but it always feels that the trouser legs are different in length.
There was once a little girl who went to high school. Her shoulders and arms were uncomfortable and dizzy. Tell me, "Auntie, my legs are not the same length." I asked her what was wrong, and she said, "I've been wearing pants that fit my legs, and the other one just stepped on my trouser leg." Look at her lacing, one leg doesn't hurt, and the other leg is severely contracted on the trouser leg. Tell her to pay attention to her sitting posture when she goes back, and insist on pulling the tendons, especially the legs that feel short, and pull them twice more.