Swelling and stiffness of the fingers after sleeping may be arthritis, bad sleeping posture, high salt diet, etc., need to be treated accordingly for the cause of the disease, unrelieved recommended to go to the orthopedic department of the hospital in a timely manner. 1. Arthritis is a common cause of finger swelling and stiffness in the morning, and can occur in many different forms, such as rheumatoid arthritis and osteoarthritis. 2. Treatment for arthritis focuses on relieving symptoms and enhancing joint function: Doctors often recommend analgesics (e.g., acetaminophen); narcotics (e.g., oxycodone); and nonsteroidal anti-inflammatory drugs (e.g., ibuprofen). In more severe cases, doctors may recommend surgery such as joint repair or joint replacement. 3. A high sodium diet can also cause swelling and stiffness of the hands in the morning. The main treatment is to reduce sodium intake. 4. For some people, swollen and stiff hands in the morning are a sign that they are sleeping in the wrong position. All you need to do at this point is to change your sleeping position. 5. There are many reasons why your fingers are swollen and stiff in the morning. Some are easy to fix while others require medical attention.