Which of the following is a sign of potential arthritis?

Stiffness in joints is a significant sign of potential arthritis. Arthritis is characterized by inflammation of the joints, which often leads to swelling, pain, and decreased range of motion. The stiffness is particularly noticeable in the morning after prolonged periods of inactivity or after sitting for a long time. This symptom can be indicative of various types of arthritis, including osteoarthritis and rheumatoid arthritis.

In contrast, frequent headaches, high blood pressure, and frequent urination do not specifically correlate with the typical signs of arthritis. While these conditions can signal other health issues, they are not direct indicators of joint health or potential arthritis. Therefore, the presence of joint stiffness stands out as a hallmark symptom associated with this condition.