Finger swelling in the morning can result from edema, inflammation and rheumatoid arthritis, according to doctors Madhu Kandarpa and John Goldman for HealthTap. Osteoarthritis is another potential cause, according to WebMD.
According to Mayo Clinic, rheumatoid arthritis is an inflammation disease that affects joints in the hands and feet. It is typical that symptoms of this disease are present in the morning or after long sedentary periods. Rheumatoid arthritis is usually the culprit for increased swelling in fingers and toes. The disease is typically common among people over 40, but Mayo Clinic notes that it can occur at any age.
Another possibility is edema. Edema is characterized by an accumulation of fluid within the body's joints. Typically, this accumulation occurs in the fingers, hands and feet. A well-known culprit for the onset of edema is a high concentration of salt in the blood, according to Mayo Clinic.
Osteoarthritis is another common cause of hand and finger swelling, as noted by WebMD. Osteoarthritis is known as "wear and tear" arthritis. Overuse, injury, stressed joints and high impact on the hands and fingers are all potential causes of swelling in the hands due to osteoarthritis. Symptoms of osteoarthritis are commonly mistaken for carpel tunnel syndrome symptoms.