Myasthenia gravis mainly refers to muscle spasm, which is a spontaneous tonic contraction of the muscles. The common causes are systemic factors, local factors, poor posture, excessive fatigue, environmental stimuli and so on.
1. Systemic factors: muscle spasms are commonly caused by some systemic diseases, such as hyperthermia, epilepsy, hypocalcemia, rabies, tetanus and so on, which can lead to generalized muscle twitching and spasm.
2. Local factors: common muscle spasms in the calf gastrocnemius muscle, mainly due to strenuous exercise, excessive fatigue, neck twisting and twisting, often occurring during sleep.
3. Poor posture: such as lying on the back for a long time, lying down for a long time, etc., due to the calf muscles are in a state of absolute relaxation for a long time, which can lead to passive muscle contracture.
4. Excessive fatigue: when the exercise is strenuous and the exercise time is too long, lactic acid accumulation occurs in the muscles of the lower limbs, which can lead to muscle spasm.
5. Environmental stimulation: commonly found in cold environment, muscle spasm can occur under cold stimulation.
For people with long-term muscle spasms, they should actively consult the doctor to clarify whether there is a primary disease and carry out appropriate treatment.