Neck pain when doing sit-ups may be related to factors such as neck pressure, excessive neck force or cervical disc herniation. 1. Neck pressure: If the hands on both sides of the neck can’t help but push forward when doing sit-ups, which puts pressure on the neck, it may cause neck pain. 2. Excessive neck force: people who do not have enough abdominal strength may exert their necks forward when doing sit-ups, resulting in excessive neck force, which may cause certain stimulation to the neck muscles or ligaments, and thus may cause neck pain when doing sit-ups. 3. Cervical disc herniation: people with a history of cervical disc herniation, when doing sit-ups, if the force is not correct, such as hand force compression of the neck or neck force, can lead to the recurrence of cervical disc herniation, thus causing neck pain. If it is difficult to relieve neck pain when doing sit-ups, it is necessary to consult a doctor in time, and a professional doctor will clarify the cause of the disease and formulate an individualized diagnosis and treatment plan.