Also called: PsA; arthritis with psoriasis
Exercise strongly helps
Strength
Stretch
Massage
Inflammation centred on the entheses - where tendon meets bone - rather than on the joint lining. That is why the Achilles, the plantar fascia and the elbow hurt in a pattern that looks exactly like ordinary tendinopathy but does not answer to ordinary loading.
How common: Around 30% of people with psoriasis develop it, which works out at roughly 0.5-1% of adults - about as common as rheumatoid arthritis and far more often missed
What it is
Psoriatic arthritis is an inflammatory arthritis associated with psoriasis, and its distinguishing feature is enthesitis: inflammation where tendons and ligaments attach to bone. That is a different target from rheumatoid arthritis, which attacks the joint lining.
The practical consequence is that it masquerades as tendinopathy. Achilles pain, plantar heel pain, tennis elbow - all in the classic locations, all failing to respond to progressive loading, and often in several places at once. Recognising the pattern matters, because effective medical treatment exists and delay allows joint damage.
What it feels like
- Pain where tendons attach - Achilles, heel, elbow, knee, ribs
- Morning stiffness lasting over half an hour, easing with movement
- Swelling of a whole finger or toe like a sausage, which is characteristic
- Psoriasis of the skin or nails, sometimes minor and sometimes years earlier
- Fatigue, and pain that is worse with rest rather than with activity
What causes it
Most people have more than one of these at once, and they feed each other. Read the
list looking for the two or three that sound like your week rather than for the one
true answer — the ones that describe you are the ones worth acting on.
- Enthesitis
- Inflammation where tendon and ligament attach to bone is the hallmark. It explains the distribution - heels, elbows, ribs, knees - and it is why the pattern looks like tendinopathy.
- Autoimmune process
- The immune system targets the entheses and the joint lining. It is a systemic disease rather than a local problem, which is why it affects several sites at once.
- Association with psoriasis
- Most people have skin psoriasis, usually preceding the joint symptoms, though it can be minimal - a patch behind an ear, nail pitting - and easily overlooked by both patient and clinician.
- Nail involvement
- Nail pitting and separation are strongly associated with enthesitis, since the nail bed is anatomically continuous with the enthesis of the finger. Nail changes in someone with heel or elbow pain is a useful clue.
- Genetics
- Family history is common and specific genetic markers are associated, particularly with the spinal form.
- Mechanical stress at entheses
- Entheses are inflamed where mechanical stress is highest, which is why weight-bearing sites like the heel are most affected and why loading can aggravate an inflamed enthesis.
- Obesity
- Associated with both a higher incidence and worse treatment response, probably through both mechanical loading and inflammatory signalling from fat tissue.
- Not responding to tendon loading
- The clinical clue that matters. An Achilles or plantar problem that fails a proper progressive loading programme, particularly alongside other sites and morning stiffness, should raise the question.
- Delay in diagnosis
- Frequently treated as several separate tendinopathies for years. Delay allows joint damage that early treatment prevents, which makes recognising the pattern genuinely consequential.
Who tends to get it
- Anyone with psoriasis, including minimal skin or nail involvement
- People with a family history of psoriasis or psoriatic arthritis
- Anyone with tendon pain at several sites that has not responded to loading
- People with a swollen whole finger or toe
- Adults between thirty and fifty, when onset peaks
What makes it worse, and what settles it
Makes it worse
- Heavy loading of an actively inflamed enthesis
- Prolonged rest, which increases stiffness and costs muscle
- Delay in diagnosis, which allows joint damage
- Untreated disease, since the inflammation is what does the damage
- Being treated as several separate tendinopathies
Settles it
- Getting the diagnosis, which unlocks effective medical treatment
- Regular movement and range work, since stiffness responds to activity
- Strength training modified around active entheses, which maintains muscle and function
- Weight management, which improves both symptoms and treatment response
- Working with rheumatology so exercise and medical treatment support each other
What actually helps
The short version: Inflammation centered on entheses - the places where tendon meets bone - rather than on the joint lining. That is why the Achilles, the plantar fascia and the elbow hurt in a pattern that looks exactly like ordinary tendinopathy but does not answer to ordinary loading
Strength work: Full Body; Hands, Fingers, Grip; Legs: Quads; Glutes; Back: Lats - moderate loads, more repetitions, and stop short of a joint that is actively swollen
Stretching: Full Body; Spine; Legs: Calves: Achilles Tendon; Feet, Toes, Ankles: Plantar Fascia; Chest
Massage: Legs: Calves; Feet, Toes, Ankles: Plantar Fascia; Back - away from an inflamed enthesis, not on it
Also worth doing: Take the medication - exercise is an addition to disease-modifying treatment and never a replacement. Skin and nail changes are the clue that gets you the diagnosis in the first place
What the evidence says: High-intensity interval training over 11 weeks meaningfully reduced fatigue with no worsening of joint pain, and resistance-training trials show real gains in strength and function. The practical point that matters most: heel or Achilles pain in someone with psoriasis may be enthesitis, and loading it like a tendinopathy can fail for months before anybody checks.
The names above are the Targets qFIT tracks —
the Muscle Guide explains what each one does, and
Quick Add switches on the Exercises you
already have.
The qFIT routine for this
Ready-made routineInflammatory Arthritis (RA, PsA & Axial SpA)
qFIT already has this one built. It runs massage first, then stretching, then
strength — the order that works on a body that is already sore — and every
activity in it carries the reason it is there.
The button below opens your Checklist with this routine already selected, so instead
of your whole list you land on just its Categories, Targets
and Exercises, each with its checkbox, ready to tick as you work through
them.
Have more than one problem? Tick yours under My Problems on
My Profile and your Checklist's Routine list gains
Recommended for my problems — every routine for the problems you picked, merged
into one. Your picks stay private; that filter is the only thing they feed.
Get it checked if…
A single hot swollen joint, a whole swollen finger or toe (dactylitis), new eye pain or redness, or morning stiffness lasting over an hour - that needs a rheumatologist, not a loading program
And whatever the body part: chest pain or unusual breathlessness on
exertion; a fever alongside the pain; unexplained weight loss; pain that is constant and
unrelated to how you move; new numbness, weakness or loss of bladder or bowel control; or
one calf that is swollen, warm and painful. Any of those, stop and get assessed.
How it usually goes
Modern treatments for psoriatic arthritis are highly effective and early treatment prevents joint damage, which makes recognition the most valuable thing on this page. Exercise improves function, stiffness and fatigue and should be modified around actively inflamed sites rather than stopped. Tendon pain at multiple sites that does not respond to progressive loading, particularly with morning stiffness, nail changes or psoriasis, is worth raising with a doctor rather than trying another loading programme.
Prevalence basis: Dermatology cohort studies of psoriasis-to-arthritis conversion
Others the same routine covers
These share the Inflammatory Arthritis (RA, PsA & Axial SpA) routine, so the work is the same. If one of them also
sounds like you, that is a reason to expect more from it, not less.
This is general information, not a diagnosis, and it cannot examine you.
If it matches you, use it to ask better questions of a clinician rather than to replace one.