A rice-sized, hard, cartilage-like mass on the wrist is one of the symptoms of a tendon sheath cyst. Tendon sheath cyst (thecal cyst) is the most common type of mass on the dorsal side of the wrist, and can also occur on the joint capsule and tendon sheath in other parts of the body. It mainly occurs in several groups of people, one is the office workers, every day hand holding the mouse wrist and tiger mouth repeatedly too much force, one is breastfeeding women, postpartum weakness, coupled with the care of the baby, wrist strain caused by tendon sheath inflammation, one is older women, take care of children and grandchildren, take care of the family, due to strain. So how can we prevent the occurrence of hard cartilage-like lumps in the wrist that are the size of grains of rice? Now let me tell you how to prevent it. 1, avoid excessive manual labor, because tendon sheath cyst is repeated friction caused by inflammation, women are more likely to suffer from tendon sheath cyst, usually occurs in the wrist and finger parts, so do not overuse the wrist, when doing work to pay attention to the correct way to use the hand, more hand shaking to relax the wrist. 2, massage their own wrists to prevent tendon sheath cysts, so as to avoid long-term damage to the occurrence of tendon sheath cysts, some people are working at the computer, is particularly prone to tendon sheath cysts, usually can rotate the joints around to protect the wrist joints, so as to avoid the occurrence of tendon sheath cysts. 3, we exercise more, such as running, playing badminton and other sports to relax the wrist, this is the simplest way to prevent tendon sheath cyst, not much activity, to rest more, or will be prone to this disease, you can eat more nutritious food, like eggs and other foods. Note: Note that patients should usually exercise more, do not spend a long time on the computer, let the wrist more rest, more out of the fresh air, after all, good habits will have a good body.