Sitting for a long time arm swelling and pain can be divided into physiological and pathological. Physiological may be due to arm muscles in the same state for a long time, muscle tension caused. Pathologic may be due to nerve root cervical spondylosis, fasciitis and so on. It is recommended that the patient go to the hospital in time to clarify the cause of the disease. 1. Physiological: Sitting for a long time, the arm muscles are in a state for a long time without relaxation, thus appearing the symptoms of arm swelling and pain. Usually, it can be relieved after changing the position. 2. Pathologic (1) Neurogenic cervical spondylosis: Early on, patients may experience neck pain and stiffness in the neck, followed by symptoms such as radiating pain or numbness in the upper limbs. Neck activities, coughing, sneezing, exertion and deep breathing can cause aggravation of symptoms. (2) Fasciitis: pain, muscle tension, muscle spasm or dyskinesia in the affected area caused by a variety of reasons, which may lead to limb movement dysfunction if left untreated. Sitting for a long time arm swelling and pain suggests that patients go to the hospital in time to clarify the cause of the disease and treat the cause.