Heat or ice for back pain?

Heat or ice for back pain? For most everyday back pain, heat has the better evidence. In trials of back pain that had lasted up to about three months, heat wraps gave a small, short-term drop in pain and disability. For cold, there is too little research to say either way. The NHS suggests both: an ice pack for pain and swelling, and heat for stiffness and muscle spasms (NHS). Whichever you choose, protect your skin and keep moving.

Heat or ice for back pain: the short answer

• Heat: moderate evidence of a small benefit over a few days, in acute and subacute back pain (up to about three months).
• Ice: too few good trials to draw a conclusion.
• Heat against ice: the head-to-head evidence is conflicting.
• Either one is a comfort measure that can make it easier to move. Neither is a treatment on its own.

What the trials found about heat

The main summary of the evidence is a Cochrane review of 9 trials with 1,117 people (French et al., 2006). Its findings, in plain terms:

• In two trials with 258 people with acute or subacute back pain, a heat wrap reduced pain after five days compared with a placebo pill. The difference was about one point on a five-point scale.
• In one trial of 90 people with acute back pain, a heated blanket reduced pain straight after it was applied.
• In one trial of 100 people, adding exercise to a heat wrap reduced pain further after a week.

The authors’ conclusion was measured: there is moderate evidence, from a small number of trials, that heat wraps give a small, short-term reduction in pain and disability, and that adding exercise helps further. They called the evidence base limited and asked for better trials.

Heat compared with painkillers

The largest single trial randomised 371 people with acute non-specific back pain. One group wore a low-level heat wrap at 40°C for eight hours a day, others took ibuprofen or paracetamol at set daily doses. Over the first four days, the heat wrap group reported more pain relief than either tablet group, more trunk flexibility, and less disability by day four (Nadler et al., 2002).

Keep the limits in mind. The trial lasted four days, only the investigators were blinded, and the wrap was worn for hours at a steady low temperature, not the brief blast of a hot water bottle.

Heat plus movement

A smaller trial split 100 people with back pain of less than three months into four groups: heat wrap alone, exercise alone, both, or an advice booklet. A week later, 72% of the heat-plus-exercise group were back to their normal function, against 20% with heat alone, 20% with exercise alone and 19% with the booklet (Mayer et al., 2005). Each treatment alone tended to beat the booklet. Together they did clearly better. It was a small, short study, but it fits the Cochrane finding that adding exercise to heat helped further.

That is also how one major guideline treats it. The American College of Physicians recommends that, because most acute and subacute back pain improves over time regardless of treatment, people should first try non-drug options, with superficial heat the one backed by moderate-quality evidence (Qaseem et al., 2017).

What about ice?

There is very little to go on. The Cochrane review found only three poor-quality studies of cold for back pain and said no conclusions could be drawn. The evidence comparing heat with cold was conflicting (French et al., 2006).

One later trial in Iran compared a hot water bag with ice in 87 people with acute back pain, both alongside the anti-inflammatory naproxen, and a third group took naproxen alone. Both heat and cold groups improved over two weeks of follow-up, and the heat group reported significantly less pain than the cold and naproxen-only groups (Dehghan & Farahbod, 2014). It was a single small trial, so it nudges the picture rather than settling it.

None of this means ice is useless. It means nobody has tested it well. The NHS suggests an ice pack wrapped in a tea towel to reduce pain and swelling. If your back is stiff rather than swollen, its suggestion is heat (NHS).

Heat or ice for back spasms

NHS inform lists stiffness and muscle spasms among the usual symptoms of back problems (NHS inform), and the NHS specifically suggests a heat pack or hot water bottle, wrapped in a tea towel, to relieve joint stiffness or muscle spasms.

For sciatica, where pain runs down the leg, the NHS also suggests holding heat packs to the painful areas, along with carrying on with normal activities and starting gentle exercise as soon as you can (NHS). There is more on what sciatica is in the glossary.

The same advice applies to the neck. NHS inform says heat or ice on the neck can help reduce symptoms (NHS inform), and the NHS suggests heat or cold packs if you have neck pain with tension headaches (NHS). See stiff neck after sleeping and Can neck pain cause headaches?.

How to use heat and ice safely

Both heat and ice can burn the skin. NHS inform’s advice for back problems is:

• never put ice or heat directly on your skin; use a barrier such as a towel;
• use ice for up to about 15 minutes, leaving a few hours between treatments;
• stop, and get advice from a medical professional, if the skin becomes redder, discoloured or blistered;
• do not use ice or heat at all if you have problems with circulation or feeling in the area (NHS inform).

For hot water bottles, the NHS burns network in Scotland adds: never use boiling water, fill no more than two-thirds, use a cover, and do not sit or lie on the bottle, because pressure can make it burst. Bottles last around two years; the year of manufacture is in the middle of the “daisy wheel” on the neck. People with diabetes or reduced feeling in their skin should take extra care (Care of Burns in Scotland).

A risk for desk workers who use heat every day

Long, repeated exposure to heat below burning level can cause erythema ab igne, a mottled, net-like red or brown rash. It often appears on the lower back, where people use heating pads for pain (Sathe & Roach, 2025). If you sit all day with a heat pad pressed between your back and the chair, that is the pattern to watch for. A rash like this is also a sign that the back pain itself has been going on long enough to be worth getting assessed.

Heat or ice is not the whole plan

Heat and ice change how your back feels for a while. The first thing the NHS suggests for speeding up recovery is to stay active: carry on with daily activities, try exercises and stretches, and do not stay in bed for long periods (NHS). NICE’s guideline on low back pain does not make a recommendation on heat or cold at all. Its advice centres on information about back pain, encouragement to continue normal activities, and exercise (NICE NG59).

In practice, that makes heat a bridge. Warm up a stiff back, then move it. Our lower back stretches page shows one exercise from the app, and Is walking good for back pain? looks at the simplest movement of all.

For desk workers, the setting matters too. The NHS notes that the cause of back pain is not always obvious, which is what doctors mean by non-specific back pain, and NHS inform lists staying in one position too long among the things that influence it. Start with how to set up your office chair and lower back pain from sitting. If your back is worst first thing, see Why does my back hurt in the morning?.

When to see a doctor

The NHS says back pain usually improves within a few weeks. See a GP if it has not improved after a few weeks of treating it at home, stops you doing day-to-day activities, is worse at night or does not improve with rest, or you are worried. Ask for an urgent GP appointment or contact 111 if you feel hot, cold, shivery or generally unwell, or the pain is severe and starts suddenly or gets worse quickly.

Call 999 or go to A&E if back pain comes with:

• pain, tingling, weakness or numbness in both legs;
• loss of feeling around your genitals or anus;
• changes in your bladder or bowels, or in sexual sensation or function;
• chest pain;
• or it started after a serious accident (NHS).

These are the red flags no hot water bottle should cover up. More on how back pain usually behaves over time is in Will back pain go away on its own?.

What to take from it

• Heat has modest evidence for short-term relief of back pain in its first weeks and months. Cold has hardly been studied.
• The NHS suggests both: ice for pain and swelling, heat for stiffness and spasms.
• Protect your skin, and watch for burns or rashes if you use heat every day.
• Use the relief to move. Heat with exercise did better than either alone.

Bavelu’s sessions for the lower back are designed and filmed by physiotherapists, for when your back is ready to move again.