What symptom could point towards an issue in the musculoskeletal system?

The presence of joint deformities is a significant symptom that can indicate an underlying issue within the musculoskeletal system. The musculoskeletal system comprises bones, muscles, cartilage, tendons, and ligaments, all of which are crucial for movement and physical support. Joint deformities often arise as a result of conditions such as arthritis, congenital malformations, or injuries that affect the structure and function of the joints.

Identifying joint deformities can lead to further evaluation and treatment of diseases affecting the joints, such as osteoarthritis or rheumatoid arthritis, or even systemic issues that may impact musculoskeletal health. Thus, joint deformities serve as a clear and direct symptom pointing towards possible musculoskeletal system disorders, making it crucial for healthcare professionals to assess and address these signs promptly.

In contrast, the other options like itching, hallucinations, and excessive mood swings are more closely associated with skin, neurological, or psychological conditions, and do not directly suggest musculoskeletal problems.