Infant leg lines, more on one side and less on the other, may be normal, but congenital hip deformity needs to be excluded. If the infant is obese, bilateral lower limbs are symmetrical, equal in length, knee joints are at the same level, and lower limb activities are normal, it may be a normal condition, mostly caused by uneven fat distribution. Need to exclude congenital hip deformity, due to abnormal hip development, hip dislocation, etc., can cause the infant leg lines asymmetrical, serious knee is not at the same level, the length of the legs are not equal, you need to go to the hospital for examination, diagnosis and timely treatment. Found that the baby leg lines more on one side and less on the other side, need to rule out abnormalities, take the child to the hospital in time to let the doctor check it out, professional doctors may want to do auxiliary examination, ultrasound examination of infants less than 6 months old is more accurate, more than 6 months to take X-ray film examination is more reliable.