Neonatal weakness in suckling refers to the fact that the newborn baby eats significantly less milk, seems to be unaware of hunger, has a short and weak suckling time, and tends to choke on milk when eating milk. Chinese medicine believes that the main factor of this disease is that children are mostly congenitally endowed with insufficient Qi and blood, and the Yang is not invigorated, followed by improper postnatal care and feeling cold, so the disease has a high incidence in the cold season in the north. Western medicine believes that the pathogenesis of this disease is not fully understood, and can be caused by cold, premature birth, infection and asphyxia, etc. The first to be affected are often the muscles innervated by the brain, the most common being ptosis, a few with weakness of the ball muscles or weakness of the trunk muscles of the limbs as the first symptom, the symptoms and signs of muscle weakness are light in the morning and heavy in the evening, and can be variable, and later can be in a state of incomplete paralysis, muscle weakness is worse after activity and less after rest. The symptoms and signs of muscle weakness are light in the morning and heavy in the evening. The extraocular muscles are most often involved, often as an early symptom, but can also be limited to the eye muscles, eye opening weakness, ptosis is mostly bilateral, but can also be unilateral, when the extraocular muscles are weak, eye movement is limited, often accompanied by strabismus and diplopia, or even eye immobilization, the intraocular muscles are generally unaffected, pupillary reflexes are mostly normal, called eye muscle type myasthenia gravis. When the spherical muscles are involved, the facial muscles, tongue muscles, masticatory muscles and pharyngeal muscles are also easily involved, the soft palate muscles are weak, the pronunciation is nasal, and the tone is low or hoarse after a few moments of conversation, often manifesting as difficulty in swallowing and pronunciation, choking and coughing when drinking, weakness in chewing, uncontrollable tongue movement, no muscle bundle tremor, dull facial expression, shallow forehead lines and nasolabial folds, drooping corners of the mouth, weakness in the neck, etc., or sudden death due to acute respiratory insufficiency. In severe cases, the respiratory muscles are involved, especially the proximal limb weakness is obvious, showing difficulty in lifting the head, holding the head with the hands, chest tightness and shortness of breath, washing the face, dressing tiredness, walking difficulties, can not walk for a long time, some only show two lower limbs weakness, tendon reflexes exist, no sensory impairment, called generalized myasthenia gravis. The disease mainly involves skeletal muscle, but there can also be myocardial damage, but most do not have obvious complaints, while the literature reports that 25% to 50% of MG patients have myocardial damage at autopsy, myasthenia gravis is accompanied by other diseases, such as thymoma, followed by hyperthyroidism, and a few with rheumatoid arthritis, polymyositis, lupus erythematosus, autohemolytic anemia, etc.