There are many reasons for a hard bag on the spine of the back, mainly related to clogged pores of the back, tumors, bone fractures and so on.
1. Pore blockage: when the pores in the back are blocked, resulting in local metabolites not being able to be discharged on their own, a hard bag will appear in the back, and this hard bag is called a sebaceous cyst.
2. Tumor: for example, neurofibroma hyperplasia will also appear lumps, and the lumps are hard and painful when pressed.
3. Fracture: A spinal fracture can lead to a localized bulge, while a subluxation can lead to a localized bulge and a corresponding stage of depression.
There may be other reasons for a hard lump on the back spine. If a hard lump appears on the back spine and does not subside for a long time or other symptoms appear, it is recommended to consult a doctor in time, complete the relevant examinations, and give targeted treatment and therapy after clarifying the cause of the disease.