Symptoms such as swelling, pain, and numbness in the fingers may be caused by the following: 1. It may be caused by peripheral neuritis. It is usually caused by frequent exposure to chemicals or cold water, which leads to aseptic inflammation of the peripheral nerves of the fingers and abnormal nerve sensation. 2. It may be caused by carpal tunnel syndrome. It is usually caused by the median nerve passing through the carpal tunnel, stimulated and compressed by the inflammation and edema of the tissue inside, which leads to the numbness or ant bite sensation of the fingers, and even the pulling pain and weakness of the nerve. The symptoms are usually more pronounced in the three and a half fingers on the radial side. 3, it may be a cervical spine disease that causes degenerative changes in the cervical spine. For example, herniated disc, small joint misalignment or osteophytes, which compress the nerve roots of the upper limbs, may also cause pulling pain, numbness and weakness of the fingers. 4. It may also be caused by internal diseases, such as rheumatoid arthritis.