Excluding the local environment temperature is too high, back sweating more consider metabolic disorder, local hyperhidrosis, infection, tumor and other causes. 1. Metabolic disorders: when the patient may have a combination of hyperthyroidism, diabetes and other underlying diseases, it is easy to produce more sweat. 2. Hyperhidrosis: the patient may suffer from localized hyperhidrosis, where the lesion is confined to the back, and thus the back is prone to produce sweat. 3. Infection: If you suffer from tuberculosis, in addition to respiratory symptoms, you will also experience fever, night sweats, and emaciation. It will also lead to the symptom of excessive sweating on the back. 4. Tumor: If you suffer from lymphoma, the main clinical manifestations are painless lymph node enlargement, fever, night sweats, emaciation and other symptoms. It can also cause the symptom of excessive sweating on the back. If the back sweating is abnormal, and exclude environmental factors, you should consult a doctor in time to clarify the diagnosis and carry out targeted treatment.