Original: A 2003 study found that regular use of chopsticks by the elderly may slightly increase the risk of osteoarthritis in the hand, a condition in which cartilage is worn out, leading to pain and swelling in the hand joints.
Simplified: It found that people who use chopsticks regularly have a slightly higher risk of getting arthritis in the hand. With this, cartilage gets worn off, which causes pain in the joints of the hand.