There are many reasons for throbbing pain in the arm, which may be caused by certain physiological reasons, such as overwork, catching a cold, mental tension, etc., or it may be a symptom of certain diseases, mainly cervical disc herniation, neuronopathy, etc. 1. Physiological reasons: If you need to keep a fixed position for a long time during labor or catch a cold, it may lead to over-excitement of the arm muscles and cause muscle spasm, and then the symptom of throbbing pain in the arm will appear. Prolonged mental tension or anxiety may cause frequent nerve contractions and muscle spasms, which may also lead to muscle throbbing and throbbing arm pain. 2. Cervical disc herniation: the herniated discs of patients with this disease will compress the cervical nerves, and after the roots of the cervical nerves are stimulated by the herniated discs, it may cause pain in the distribution area of the nerves, such as radiating to the arm, which will cause muscle throbbing and pain in the arm. 3. Neuron disease: autoimmune peripheral neuropathy in the neck or brain caused by various reasons such as chronic viral infection, heavy metal poisoning, nutritional and metabolic disorders, etc., may cause nerve damage in the arm, resulting in increased muscle tone and muscle atrophy, which will lead to symptoms of throbbing pain in the arm muscles. In addition to the above mentioned diseases, pancreatitis, localized infections and other diseases can also have symptoms of throbbing arm pain. If you are experiencing throbbing arm pain, you should consult a doctor for treatment after eliminating physiological factors.