Patients with hidden pain in the left back under the scapula can have the following causes: First, herpes zoster: In the early stage, there can be hidden pain under the scapula, there can be tingling or radiating pain, and after the latent period, there can be herpes appearing, at which time it is necessary to go to dermatology for early diagnosis and treatment. Second, lung disease: lung inflammation, early tumor can also appear under the scapula back hidden pain, this time to check the lung CT for diagnosis and treatment. Third, intercostal neuralgia: intercostal neuralgia can lead to hidden pain or radiating pain in the intercostal nerve in the back below the scapula, which should be investigated at an early stage and given nutritional nerve therapy and physical therapy at an early stage. In conclusion, the above are the common causes of left back subscapularis hidden pain.