Hidden pain in the left lower abdomen and left back may be soft tissue injury, or cervical spine disease, chest wall disease, heart disease, etc., and you should consult a doctor in time to find out the cause. 1. Soft tissue injury: generally due to muscle strain caused by overexertion, cold, cold, poor posture, long-term work, or myofibrillitis, no special treatment is needed. 2. Cervical spine disease: nerve root cervical spondylosis may cause pain in the back of the shoulder and upper limbs, in which the pain caused by nerve root cervical spondylosis is usually distributed along the direction of the nerves, if the left back pain. 3. Chest wall diseases: Herpes zoster, costochondritis, chest wall tuberculosis, chest wall tumors and other diseases can lead to the involvement of the area around the chest wall, which can be manifested as pain in the lower left side of the back, but not limited to the lower left side. 4. Heart disease: when patients have hidden pain in the back, they should be cautious of radiating pain caused by heart disease, such as myocarditis, coronary heart disease and so on. It may also be caused by other factors. It is recommended that the patient consult a doctor in time to clarify the cause of the disease and give targeted treatment.