Psoriatic arthritis often has the same symptoms as rheumatoid arthritis, but also includes lower back pain, foot pain, and swollen fingers and toes, according to Mayo Clinic. It is important to treat psoriatic arthritis as soon as possible because, left untreated, it can severely damage joints.
Both sides or one side of the body can be affected by psoriatic arthritis, Mayo Clinic states. Just as with rheumatoid arthritis, psoriatic patients have painful, swollen joints that are warm to the touch.
Some psoriatic arthritis patients develop a condition called spondylitis in which the joints between the vertebrae in the spine become painful, Mayo Clinic reports. Another condition, sacroiliitis, affects the joints between the spine and the pelvis. Both cause back pain.
Foot problems are common with psoriatic arthritis patients, Mayo Clinic explains. The disease most commonly causes problems with the Achilles tendon and the sole of the foot. Pain begins at the point where tendons and ligaments attach to the bones. Feet and hands can become deformed from psoriatic arthritis. It is common to have swelling in the hands and feet as well as significant swelling in the toes and fingers.
Psoriatic arthritis is a chronic disease that gets worse over time, Mayo Clinic reports. However, symptoms can improve or the disease can go into remission for a certain amount of time.