Psoriatic arthritis is a type of inflammatory arthritis that can affect some people who have psoriasis. First signs can include joint pain and swelling. Early treatment can help prevent joint damage.
Psoriatic arthritis (PsA) is an inflammatory form of arthritis that can cause pain and swelling in the joints. It occurs alongside psoriasis, a chronic skin disease.
In this article, we look at the early signs of PsA that people can watch out for, as well as diagnosis, treatment, and outlook.
According to the Arthritis Foundation, around one-third of people with psoriasis develop PsA.
It can take around 10 years for PsA to develop in people with psoriasis, and symptoms of PsA often appear between the ages of 30–50 years. PsA affects all genders equally.
Some people develop PsA without ever developing psoriasis. While the majority of people have psoriasis first and then develop PsA, for some people, PsA symptoms appear before psoriasis symptoms.
The following symptoms can be early signs of PsA:
Joint pain and stiffness
People may experience warmth and swelling in the joints, which doctors call peripheral arthritis. They can experience these symptoms on different sides of the body, which is called asymmetrical arthritis. For example, people may have warmth and swelling in the right hand or left knee.
People may have swelling in an entire finger or toe. This may make movement difficult and may feel painful. Doctors call this dactylitis, commonly known as “sausage digit.”
Enthesitis
PsA can cause enthesitis, which is inflammation of the entheses. Entheses are connective bands of tissue that join tendons and ligaments to the bone.
People with enthesitis may feel pain in the area where the inflamed entheses are in the body.
Pitted nails
People with PsA may have pitted nails. They may also notice cracking and white spots on the nails.
Nail separation
PsA can cause nail disease. The nails may lift and separate from the nail bed.
Lower back pain
People may experience pain or stiffness in the lower back. It may also affect the buttocks.
People may also have painful, stiff necks or hips. Doctors may refer to this as axial arthritis or psoriatic spondylitis.
Roughly 20% of people with PsA will develop symptoms affecting the spine.
Swollen fingers or toes
People may notice swelling in one or more of their fingers or toes. The medical term for this is dactylitis, or “sausage digit.” The swelling may feel painful.Swelling of the fingers and toes can be a sign of severe, unmanaged PsA. People will need treatment to ensure no permanent damage to their joints.
Eye inflammation
According to the National Psoriasis Foundation, around 7% of people with PsA will develop uveitis, which is inflammation of the eye.
Symptoms can affect one or both eyes, and people may experience:
Inflammation of the entheses commonly affects the feet and ankles. People may have swelling or pain at the back of the heel and across the bottom of the foot.
Elbow pain
PsA can affect various parts of the body. People may experience elbow pain if PsA causes inflammation of the tendons in the elbows.
Reduced range of motion
Joint stiffness may affect a person’s range of motion, and people may find their movements more limited. People may also experience more stiffness first thing in the morning.
Fatigue
A lot of people with PsA may feel extreme tiredness or fatigue. People may experience this during a flare, when symptoms worsen and inflammation increases. A flare may continue for days or months.
Some people may also have a low grade fever alongside fatigue.
The following symptoms can be early signs of PsA:
Joint pain and stiffness
People may experience pain and stiffness in joints throughout their body, in particular:
People may experience warmth and swelling in the joints, which doctors call peripheral arthritis. They can experience these symptoms on different sides of the body, which is called asymmetrical arthritis. For example, people may have warmth and swelling in the right hand or left knee.
People may have swelling in an entire finger or toe. This may make movement difficult and may feel painful. Doctors call this dactylitis, commonly known as “sausage digit.”
Enthesitis
PsA can cause enthesitis, which is inflammation of the entheses. Entheses are connective bands of tissue that join tendons and ligaments to the bone. People with enthesitis may feel pain in the area where the inflamed entheses are in the body.
Pitted nails
People with PsA may have pitted nails. They may also notice cracking and white spots on the nails.
Nail separation
PsA can cause nail disease. The nails may lift and separate from the nail bed.
Lower back pain
People may experience pain or stiffness in the lower back. It may also affect the buttocks.
People may also have a painful, stiff neck or hips. Doctors may refer to this as axial arthritis or psoriatic spondylitis.
Roughly 20% of people with PsA will develop symptoms affecting the spine.
Swollen fingers or toes
People may notice swelling in one or more of their fingers or toes. The medical term for this is dactylitis, or “sausage digit.” The swelling may feel painful.
Swelling of the fingers and toes can be a sign of severe, unmanaged PsA. People will need treatment to ensure no permanent damage to their joints.
Eye inflammation
According to the National Psoriasis Foundation, around 7% of people with PsA will develop uveitis, which is inflammation of the eye.
Symptoms can affect one or both eyes, and people may experience:
Inflammation of the entheses commonly affects the feet and ankles. People may have swelling or pain at the back of the heel and across the bottom of the foot.
Elbow pain
PsA can affect various parts of the body. People may experience elbow pain if PsA causes inflammation of the tendons in the elbows.
Reduced range of motion
Joint stiffness may affect a person’s range of motion, and people may find their movements more limited. People may also experience more stiffness first thing in the morning.
Fatigue
A lot of people with PsA may feel extreme tiredness or fatigue. People may experience this during a flare, when symptoms worsen and inflammation increases. A flare may continue for days or months.
Some people may also have a low grade fever alongside fatigue.