Psoriatic arthritis (PsA) is a chronic inflammatory condition that can cause muscle pain and weakness. You might find it difficult to move around and exercise, which could result in muscle loss. If you live with psoriatic arthritis you may often experience muscle pain and weakness.

PsA can also cause muscle pain and stiffness. It sometimes occurs alongside fibromyalgia, another condition marked by muscle pain. Talk with a doctor if you experience muscle pain with PsA. To ensure proper treatment, they will want to determine whether you have both conditions or only PsA.

If you have psoriatic arthritis, you know about joint pain and skin problems. But you might not expect muscle pain. Tell your doctor if that’s a symptom you’re having. While achy muscles aren’t typical of PsA, some people with this disease also get fibromyalgia. It can cause muscle pain along with joint stiffness and fatigue.

PsA can cause muscle pain and stiffness. This may result in a person being unable to get enough regular physical activity, which may affect muscle strength and mass. Other factors such as protein metabolism, hormones, and aging may also play a role in how the condition affects the muscles.

Psoriatic arthritis can be connected to muscle pain in several ways. PsA is characterized by inflammation due to an errant immune system response. Sometimes, inflammation in the joints also spreads to the places where the tendons and the ligaments connect to those affected joints (entheses). This results in a condition known as enthesitis.