Syringomyelia is a rare disorder in which a cyst forms within your spinal cord. As this fluid-filled cyst, or syrinx, expands and lengthens over time, it compresses and damages part of your spinal cord from its center outward.Damage to the spinal cord caused by a syrinx can lead to symptoms such as progressive pain, stiffness, and weakness in the:back shoulders arms legs People with the disorder might lose the ability to feel cold and pain normally. Some people with this disorder won’t have any symptoms and won’t need treatment. For others, syringomyelia will cause symptoms and complications that worsen as the syrinx expands.Treatment aims to relieve the pressure on your spinal cord. The treatment your doctor suggests for you will depend on the cause of your syringomyelia. Follow-up care after surgery is important because syringomyelia can reoccur.