Muscle laxity is mostly caused by lack of protein, serious injury to bones or joints, etc. Treatment includes treating the primary disease, strengthening muscle exercise and improving dietary structure, etc., and there is no quick recovery method. 1. Treating the primary disease: if there is serious damage to the bones or joints, or prolonged braking, which causes muscle disuse atrophy and muscle laxity, we should actively treat the primary disease and restore the functional exercise of the bones or joints; if we clarify the cause of protein deficiency, for example, if the protein deficiency is caused by dietary problems in daily life or by other illnesses, we should actively treat the relevant illnesses as well. 2. Strengthen muscle exercise: muscle strength exercise can make muscles more developed, which has a positive effect on improving muscle relaxation. 3. Improve dietary structure: lack of protein can cause muscle relaxation, so in daily life should increase the intake of high-quality protein, eat more lean meat, eggs and other high-protein food, can improve the symptoms of muscle relaxation. If the disease factors caused by muscle relaxation should go to the hospital in a timely manner, to clarify the cause of the disease, under the guidance of the doctor for treatment, if it does not exist, daily exercise and dietary structure should be adjusted to improve muscle relaxation.