1, general weakness: from the appearance, he looks good, fleshy, without muscle atrophy, as if he were not ill; However, patients often feel seriously weak, unable to lift their shoulders and hands, unable to stand up when squatting down, and even have to rely on others to help wash their faces and comb their hair. The patient's myasthenia symptoms improved obviously after a short rest, but they will get worse obviously after doing some work, as if pretending to be sick. Most of these patients are accompanied by ptosis and diplopia.

2, ptosis: also known as ptosis. According to the analysis of 3 100 patients with myasthenia gravis, it was found that the first symptom was ptosis as high as 73%. Can be seen at any age, especially children. There are many sides in the early stage and two sides in the later stage. There are also many patients with one eyelid drooping and the other eyelid drooping, that is, the phenomenon of left and right alternating ptosis.

3, diplopia: that is, see the double image. Look together with two eyes, and one thing is regarded as two; If you cover one eye, you will see one. Very young children cannot describe diplopia. They often tilt their heads and torticollis compensatively to make diplopia disappear and see more clearly. In severe cases, they can also show strabismus.

4, swallowing difficulties: no digestive tract diseases, appetite is quite good, but good food and good food can not be swallowed, even water can not be swallowed. When drinking water, you either choke into the trachea and cause a cough, or flow out of your nostrils. Some patients have to rely on nasal feeding tubes to eat because of severe dysphagia.

5, chewing weakness: teeth are good, but biting things is very boring, even biting steamed bread is hard. The first few bites are ok, but the more you bite, the more you can't bite. It's even harder to eat pancakes and barbecue.

6, speaking nasal, hoarse voice: just like catching a cold. When some patients speak in meetings or read newspapers, their voices are ok for the first few minutes. A little longer, their voices became hoarse and deep, and finally they couldn't make a sound at all. It was ok at first, but after a long time, others couldn't hear him clearly. This is caused by weakness of laryngeal muscles.

7, facial muscle weakness: Because the facial expression of the whole face is weak, patients often can't close their eyes when sleeping. Usually the expression is indifferent, and it is unnatural to laugh, just like crying, also called smiling face. This kind of face makes people look uncomfortable and the patient is very painful.

8. Neck muscle weakness: Severe neck muscle weakness is more prominent. When the patient is sitting, there is a phenomenon of bowing his head. He can only hold his chin in his hand to raise his head. If the patient lies on his back (without a pillow), he can't bend his neck and raise his head.

9. Dyspnea: This is the most serious symptom of myasthenia gravis, which can kill patients in a short time, so it is also called myasthenia gravis crisis. This is due to severe weakness of respiratory muscles. The patient feels difficult to breathe, so he can't lie flat at night, so he can only sit and breathe. Cough with phlegm is not like heart disease, asthma or lung tumor. Most patients with this kind of dyspnea are accompanied by dysphagia, weakness of limbs or drooping eyelids.