Fatigue and arthritis: why it is real and what helps

Fatigue is common across rheumatology, yet it is seldom talked about. People say it feels less like sleepiness than being emptied out: a heavy tiredness of body and mind, far beyond anything they have done to earn it, that a night in bed does not mend and that can weigh more than the pain. It is an invisible symptom, which can make it hard to explain to others.

So the main point comes first. Fatigue belongs to inflammatory arthritis as a symptom of the disease; it is not a failing on your part. Inflammation drives it directly in axial spondyloarthritis, Sjögren's syndrome, lupus and rheumatoid arthritis; in fibromyalgia it goes with long-term pain and unrefreshing sleep rather than with inflammation. In a 2014 survey by the National Rheumatoid Arthritis Society, 89 in 100 people with rheumatoid arthritis said they had fatigue, and 4 in 10 of those described it as persistent and severe. A swollen joint gets attention, and so should this.

Inflamed tissue releases chemical messengers called cytokines, similar to those the body releases during a cold or flu, and they can cause extreme fatigue. The feeling is familiar from flu: the pull to lie still and do nothing.

When inflammation lasts for months or years, as it does in these conditions, those signals keep coming, and the exhaustion can drag on with them. That is why this fatigue does not behave like ordinary tiredness: effort does not explain it, and rest does not clear it. It also explains why tiredness and joint symptoms do not always rise and fall together. Fatigue can be worse during a flare, and it can carry on after the joints have settled, kept going by the other causes below; neither pattern means it is imagined.

Inflammation is seldom the only cause. Several things usually act at once, and each feeds the others.

• Pain uses up energy and attention all day, even on days when you do little.
• Poor sleep. Sore joints wake you, and an unrefreshing night leaves the following day more painful and more tiring, which spoils the next night too.
• Lost fitness. Exhaustion means moving less; muscles weaken and stamina fades, so everyday tasks cost more than they did.
• Low mood, anxiety and stress take energy directly, and pain, giving things up and the frustration of being tired feed them back.
• Some medicines. Painkillers that contain codeine or another opioid, and medicines such as amitriptyline, can bring drowsiness and dull concentration, and methotrexate can make you feel tired or drowsy; tiredness from a medicine is for whoever prescribes it to review, rather than a reason to stop the medicine on your own.

This is how long-term conditions tend to behave, not a sign of weakness. There is a hopeful side to it as well: because the causes are linked, improving one of them, whether sleep, activity, pain or mood, tends to ease the rest.

When inflammation is causing the fatigue, treating the disease is also the best treatment for the tiredness, and nothing else in this guide counts for as much as getting the condition properly under control. Today's treatments, biologics and JAK inhibitors as well as disease-modifying medicines (DMARDs), are designed to quieten the inflammatory signals at their source, and medicines that calm the inflammation should ease the fatigue too. European recommendations from 2023 include starting or changing such treatment, where the disease calls for it, among the ways to manage fatigue, alongside activity and talking-based approaches tailored to the person.

Two points belong beside that. Fatigue does not always lift when the joints improve: it can carry on while the inflammation is well controlled, kept going by the other causes above, and that does not mean the treatment has failed; it usually means those causes need attention of their own. And tiredness that builds as your usual joint symptoms creep back can mean the disease is becoming active again; the managing a flare guide sets out what to do and when to contact your team.

Many people fall into boom and bust, cramming everything into a good day, because at last they can, and then losing the next two or three days to exhaustion. Anyone would do the same, but the pattern lets the fatigue set the agenda.

Pacing is the alternative: treating energy as a budget to spend on purpose rather than a debt to work off.

• Plan over the week rather than the day, spreading demanding jobs out instead of piling them up.
• Split tasks into parts, and rest before you are spent, not after.
• Keep some energy for what matters to you. Giving up the things that lift your mood, to save energy for chores, can make fatigue worse.
• Turn some things down and pass others on; neither is a defeat.
• Keep a diary of what you did and how tired you were, since patterns show up in it that are hard to see from one day to the next.

Pacing does not mean surrendering to the fatigue. It is a way of staying in charge of your energy rather than letting good days and bad days decide for you.

The evidence on exercise and fatigue is counter-intuitive: the right amount of regular movement genuinely reduces fatigue rather than adding to it, though the benefit is modest rather than dramatic. Being active restores the stamina and strength that tiredness erodes, and tends to improve both sleep and mood; the key is grading it, starting from your present level and adding a little at a time. A review of trials in rheumatoid arthritis found a small benefit from physical activity, and a small benefit from talking-based approaches too. How to start without a payback the next day is covered in arthritis and exercise.

Sleep matters, and it needs no lecture. A fixed bedtime and rising time, with a quiet spell to wind down first, helps. Pain that wakes you should be treated, so mention broken nights to your team, and say so too if you wake exhausted every morning after a full night's sleep. If you snore loudly, or someone has heard you gasp or choke in your sleep, tell your GP, since sleep apnoea can cause tiredness in the day.

Some contributors to fatigue are simple to check and worth checking once: anaemia and an underactive thyroid can sap energy, low vitamin D can leave muscles weak and aching, and all of them show up on blood tests. Now and then a medicine adds to the problem, which is better reviewed than guessed at. Beyond correcting a deficiency that a test has found, supplements sold for energy have not been shown to help fatigue in arthritis, so the money is better spent elsewhere. Ordinary balanced eating supports energy in the usual way, as diet and arthritis explains.

Mood deserves its own mention, since low mood and fatigue so often come together that a question about one is really a question about both. Saying that the fatigue is getting you down is not weakness but useful information for your team, and talking therapies can lessen the impact of the fatigue itself, as well as the low mood.

Tiredness alone is seldom urgent, though some of what can come with it is, and the lists below sort those signs by how fast they need help, with what can wait for a booked appointment after them.

Treat any of these as a 999 or A&E emergency: call 999 and do not drive yourself to A&E.

• Severe illness with suspected sepsis: a high fever with shaking, confusion, rapid breathing, or feeling dramatically worse over hours
• With a fever or feeling unwell, a rash that does not fade when you press it, a stiff neck with eyes that cannot bear bright light, or skin, lips or tongue turning blue, grey, pale or blotchy, since these can be signs of meningitis or sepsis, as can a very bad headache, confusion or a first seizure with a fever or feeling unwell; on black or brown skin the rash and the change of colour may be easier to see on the palms of the hands or the soles of the feet
• Chest pain that is crushing, tight or like a pressure, that spreads to an arm, the jaw, the neck, the stomach or the back, that comes with breathlessness, sweating, feeling sick or feeling light-headed, or that came on suddenly and does not go away
• Breathlessness that is severe, with gasping, choking or no breath to get words out; or coughing up blood
• Palpitations happening now that do not stop, or that come with chest pain, breathlessness, feeling faint or fainting, since a heart whose muscle or rhythm is affected has to be checked at once
• Vomiting blood, or bleeding from the back passage that is heavy or will not stop, most of all with faintness, confusion or pain in the abdomen, or vomit that is black or dark brown, since a bleed in the stomach or gut, a common cause of anaemia, can need treatment in hospital
• Lips, mouth, throat or tongue that suddenly swell, a throat that feels tight, very fast breathing or a struggle to breathe or to swallow, skin, tongue or lips turning blue, grey or pale (on black or brown skin this may be easier to see on the palms of the hands or the soles of the feet), becoming suddenly very confused, drowsy or dizzy, or fainting and not being able to be woken, since this can be a severe allergic reaction, anaphylaxis, which can follow a dose of any medicine

Any of these needs an assessment that is urgent, on the same day, from your GP, your rheumatology team or NHS 111:

• A fever, or feeling generally unwell, on immunosuppressant, biologic or steroid treatment, since an infection has to be treated early; when tiredness comes on with a fever, check for an infection that day rather than putting the tiredness down to your arthritis, since these medicines can make an infection more serious, and without such treatment a fever, or feeling hot, cold or shivery, that comes with painful joints needs the same day too, so that an infection in or around a joint can be ruled out
• A joint that is hot and swollen, with a fever or feeling unwell, since an infected joint has to be ruled out at once, at A&E or through NHS 111
• A joint that has become hot and very swollen suddenly, or is worsening quickly, even without a fever, since an infected joint does not always announce itself with one; a joint that will take no weight at all, or that cannot be moved, is a 999 or A&E emergency, whether or not there is a fever
• New chest pain, new palpitations, or breathlessness that is new or getting worse, since anaemia can cause breathlessness and a pounding or fluttering heartbeat, and chest pain that is new needs its cause found; palpitations happening now that do not stop, or that come with chest pain, breathlessness, feeling faint or fainting, belong to the first list; in pregnancy, breathlessness that comes on suddenly, or when you lie down, or with dizziness, is for your midwife or maternity unit straight away
• Stools that are black or dark red, or bloody diarrhoea, since bleeding from the stomach or gut is a common cause of anaemia and has to be found that day; bleeding from the back passage that is heavy or will not stop belongs to the first list
• Bruising or bleeding you cannot explain, while you take methotrexate or another DMARD, since it can mean the medicine is affecting your blood count
• Being near someone with measles, chickenpox or shingles, while you take a medicine that weakens the immune system, since measles and chickenpox can be dangerous when the immune system is weakened, and you can catch chickenpox from someone with shingles if you have never had chickenpox; NHS 111 can tell you what to do that day

Tiredness that is new, plainly getting worse or out of keeping with your usual pattern is for your GP or rheumatology team within the next few weeks, rather than something to wait out, and so is tiredness with a change in your mood; weight lost without trying needs a GP within days, and blood in your stools short of the signs above needs a GP appointment, since bleeding is a common cause of anaemia. No referral is needed to be seen here; next-working-day appointments can almost always be arranged, and same-day appointments are sometimes possible. If you take methotrexate, another DMARD, a biologic or a JAK inhibitor, the warning signs that belong to each are set out in our guides to methotrexate, DMARDs and biologics and JAK inhibitors. If you cannot tell how urgent something is, asking is never a mistake.

Fatigue falls into a gap. Arthritis UK calls it often overlooked and under-prioritised, even though many people with arthritis count it among their biggest challenges. That gap can be closed. Like any symptom, fatigue can be assessed, by asking three questions: is inflammation behind it, is something checkable adding to it, and which of the causes that sustain it are at work? Treatment helps, if not completely: controlling the disease, pacing, activity, sleep and mood all play a part, held together by a plan that is reviewed rather than forgotten. When tiredness is shaping your days, make it an item for your next appointment, not an afterthought.

Is arthritis fatigue a real symptom, or is it in my head?

It is real, and the disease itself is one of its causes. In conditions such as rheumatoid arthritis and lupus, inflamed tissue releases chemical messengers like those released during a cold or flu, and they can cause extreme tiredness that lasts far longer. The tiredness is part of the disease, not a weakness on your part, and it can be assessed and planned for, as any symptom can.

Why am I so tired when my joints seem fairly quiet?

Tiredness does not always keep pace with the joints. Inflammation is one cause among several, and poor sleep, pain, lost fitness and low mood can keep fatigue going by themselves. Checkable contributors such as anaemia or an underactive thyroid can add to it, which is one reason blood tests are worth reviewing. Bring it up with your team rather than blaming yourself.

Will exercise make my fatigue worse?

Done right, the opposite. It is counter-intuitive, but the evidence goes one way: regular, gradually built-up activity reduces fatigue in arthritis, rebuilding the fitness and muscle that fatigue erodes, improving sleep and lifting mood. In trials the benefit is real but modest, which is all the more reason to start from where you are and increase slowly, rather than overdoing it on a good day and paying for it afterwards. Our guide to arthritis and exercise explains how to begin.

Will a supplement give me more energy?

Not on present evidence: a review of the trials in rheumatoid arthritis found too little to show that any supplement eases fatigue. Correcting a real deficiency, found by a blood test rather than assumed, is the exception. Iron-deficiency anaemia really does sap energy, while low vitamin D is worth correcting for the weak and aching muscles it causes, not for energy itself. Ordinary balanced eating supports energy too, and diet and arthritis sets out what the evidence on food does and does not support.

Is fatigue worth raising with my rheumatologist?

Yes, whenever it is a problem. Tiredness that is new, getting worse or out of step with your usual pattern deserves a check of its own: it may signal inflammation that is not fully under control, it can deepen during a flare, and it can point to something treatable, such as anaemia. Raise it with your GP or rheumatology team within the next few weeks. Tiredness that comes with a fever while you take a DMARD, a biologic or a JAK inhibitor needs checking that day by your GP, your rheumatology team or NHS 111; the full lists are under When to seek help. Fatigue that has been with you a long time and has not changed should be raised too, since there is useful work to be done on pacing, activity, sleep and mood.