Stiffness and inflexibility of the right hand without pain is not necessarily a disease, it needs to be determined according to the patient’s condition, it may be caused by long-term inactivity, rheumatoid arthritis, poor blood circulation and so on. 1. Long-term inactivity: the right hand is stiff and inflexible due to the lack of muscle strength caused by long-term lack of exercise and lack of activity of the right hand. 2. Rheumatoid arthritis: Rheumatoid arthritis mainly manifests as morning stiffness, small joint swelling or recurrent redness and swelling, low-grade fever, and rheumatoid nodules. It can cause symptoms of stiffness and inflexibility of the right hand. 3. Poor blood circulation: metabolic diseases such as diabetes, can cause poor peripheral circulation, local tissue nutrition is not enough so that the joints appear stiff, swollen but not painful symptoms. There may be other reasons such as cervical spondylosis pressing on the nerves, so it is recommended to go to the hospital in time to find out the cause of the disease and give corresponding treatment under the guidance of the doctor.