The back is vaguely uncomfortable, knocking on the hiccups, and then feel more comfortable may be caused by physiological reasons, may also be caused by gastritis, esophagitis and other problems. 1. Physiological reasons: due to improper sleeping posture, long time to keep the same position and other reasons, resulting in the back muscle groups in a long-term stretching state, so that the muscles are too fatigue and vaguely uncomfortable, hitting the hiccups can often alleviate the fatigue symptoms. 2. Pathologic causes: (1) gastritis: when suffering from gastritis, there will often be a feeling of bloating, indigestion and other symptoms, which can cause radiating pain in the back, knocking on the back can cause the phrenic nerve to be overexcited, resulting in hiccups, and hiccups due to the discharge of gases, often relieve the discomfort of abdominal distension, so that people feel more comfortable situation. (2) esophagitis: esophagitis, can lead to intake of food is not easy to be digested, a large amount of food accumulation in the stomach, may lead to the back of the vaguely uncomfortable, and the accumulation of food can also be caused by the gastrointestinal peristalsis is abnormal, increased gas production, knocking easy to hiccups after the symptom, along with the discharge of the gas, the patient may feel more comfortable. Appear back vaguely uncomfortable, knocking on the hiccups, and then feel more comfortable situation, it is recommended to go to the hospital in time to do the relevant examination, to avoid causing delays in the condition .