An extraordinary collection of 29 bones and joints, 17 muscles, and 48 nerves in this one small space. Because it is made up of so many parts, many different things can get hurt. The tendons that bend or flex the fingers pass from the forearm into the palm, and out to the fingers. These tendons pass through a series of tunnels, or pulleys, that hold the tendon down along the bones.
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Hand pain - NHS
Hand pain is often the result of a recent injury or from overusing the hand or wrist. However, persistent or reoccurring pain in the hand may be the sign of an underlying condition. The hands and wrists contain many different bones, joints, and connective tissues, such as ligaments, tendons, nerves, and blood vessels. Injuries to the hand can damage these structures and lead to pain, swelling, bruising, and other symptoms. Finger fractures and dislocations are common types of hand injury. The pain usually feels sudden and intense, and it may develop into throbbing or soreness over the course of several days.
Trigger Finger (Stenosing Flexor Tenosynovitis)
Wrist pain is often caused by sprains or fractures from sudden injuries. But wrist pain can also result from long-term problems, such as repetitive stress, arthritis and carpal tunnel syndrome. Because so many factors can lead to wrist pain, diagnosing the exact cause can be difficult, but an accurate diagnosis is essential for proper treatment and healing.
The hand is a miracle of engineering, but it has one design flaw: the tendons that control the fingers pass through a narrow tube in the cleft of the hand called the carpal tunnel. The median nerve that controls all the fingers except the pinky is also squeezed into that narrow tube, so any inflammation or swelling puts pressure on that vital nerve. Carpal tunnel is the injury that causes the longest absences from the workplace, but doctors are still not entirely sure what causes it. It is known that diseases like rheumatoid arthritis and diabetes increase the risk. Women are three times more likely than men to develop CTS, perhaps because their hands are smaller and therefore the carpal tunnel is narrower.