Swelling and soreness of the arm when using grip strength machine is usually related to physiological factors, chronic strain injury, wrist arthritis and other factors, which can be combined with the cause of the general treatment or drug treatment. 1. Physiological factors: the use of grip strength machine at the beginning, there may be arm swelling, soreness, mainly due to the accumulation of lactic acid in the local cause. Available hot water bag hot compress, and then local massage, can promote the local blood to restore normal circulation, reduce the formation of lactic acid. 2. Chronic strain: the use of grip strength device do not pay attention to the way and means, or due to improper operation lead to chronic strain, will cause arm swelling and pain. It is necessary to stop using the grip in time, if the pain is more obvious, you can take ibuprofen to relieve pain. 3. Wrist arthritis: may be in the process of activities leading to degenerative changes in the wrist joints. Currently need to pay attention to rest, such as joint stiffness, pain or acid swelling is more serious, can take oral glucosamine sulfate to relieve symptoms. When using the grip strength device, must pay attention to the combination of work and rest, can not be rushed, otherwise it will aggravate the injury. If you can’t get relief with the above ways, you should seek medical attention in time.