After a neck injury: call 999 or go to A&E
Call 999 or go to A&E after a neck injury if the person is unresponsive, has severe neck pain or cannot move their head, has fallen from a height such as 5 or more stairs, or is drunk or has taken recreational drugs. Do not drive yourself. Being 65 or over, a dangerous fall or crash (from more than 1 metre or 5 stairs, diving, a high-speed or rollover crash, being thrown from a vehicle, a bicycle collision or an accident on a motorised recreational vehicle), or tingling in the arms or legs after an injury puts you at high risk of a broken neck: get checked.
A stiff neck with a fever: call 999 or go to A&E
Call 999 or go to A&E: a stiff neck and you can't look at bright lights; a very painful headache; a very high or very low temperature, feeling hot or cold to the touch, or shivering; confusion, slurred speech or not making sense; a rash that does not fade when you press a glass on it; or a first seizure (fit). These can be signs of meningitis. Call too for any other symptoms you're worried might be meningitis.
Brain and artery signs: call 999 or go to A&E
Call 999 or go to A&E: a headache that came on suddenly and is extremely painful; numbness or weakness in the face or body; a drooping face, or being unable to lift both arms and keep them up; difficulty speaking, swallowing, balancing, walking or remembering; double vision or loss of vision; drowsiness or confusion. A torn neck artery often starts with headache and neck pain, sometimes with dizziness or tingling, so head or neck pain unlike any you have had before needs checking.
Signs of pressure on the spinal cord: call 999 or go to A&E
Call 999 or go to A&E: new problems walking, loss of bladder or bowel control, or a sudden loss of coordination, such as difficulty doing up buttons. These can be signs of pressure on the spinal cord.
Heart signs
Call 999: chest pain that spreads to your arm, neck or jaw, especially with breathlessness, sweating or feeling sick. It could be a heart attack.
Get help from NHS 111: pain or tightness in your chest, neck, shoulders, jaw or arms that comes and goes, often brought on by exercise, stress, emotion or cold and easing after a few minutes' rest. It can be angina, a sign of a heart problem. If you've been diagnosed with angina, get help from NHS 111 too if it feels worse than before, is happening more often, lasts longer or happens when you're resting.
Same day
Same day (urgent GP appointment or NHS 111): severe neck pain that starts suddenly or gets worse quickly; heaviness or weakness in the arms or legs; pins and needles in an arm along with neck or arm pain; or pain between the shoulder blades.
Same day: clumsiness in your hands, or numbness, pins and needles or weakness in one or both arms, that is getting worse; problems with balance or walking since the neck pain started; or neck pain with a severe headache.
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A trapped nerve that's getting worse
Arm weakness or numbness that keeps getting worse, severe pain that painkillers and rest do not touch, or an unexplained fever.
No improvement after 6 weeks of exercise, or arm symptoms still there beyond 6 to 12 weeks.
See a GP
Neck pain or stiffness that has not eased after a few weeks, or after 8 weeks of looking after it yourself; painkillers are not helping; or you are worried. In many areas you can refer yourself to NHS physiotherapy.
Severe pain that is constant or disturbs your sleep, a fever or unexplained weight loss, or a history of cancer, inflammatory arthritis, tuberculosis (TB), a weakened immune system, neck surgery or a violent injury. Serious causes are very rare, but these need checking.
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During presses, holds and shrugs
Build the pressure slowly, never push suddenly against your hand, and ease off if a press brings on a headache.
If shrugs bring on pins and needles, numbness or pain down your arm, lighten them or leave them out, and get it checked if it persists, as our shrug guide says.
Stop and get medical help
If you get chest pain or pressure, feel faint or dizzy, are unusually breathless, or your heart races or beats irregularly during exercise, as our plans advise.
Call 999 (911 in the US)
For chest pain that comes on suddenly and doesn't go away, feels tight or like squeezing, spreads to your arms, neck, jaw, stomach or back, or comes with sweating, feeling sick, light-headedness or breathlessness; severe difficulty breathing; someone who faints while exercising; palpitations that don't go away, or come with chest pain, shortness of breath or feeling faint; or a headache that starts suddenly and is extremely painful, especially while lifting or straining, or comes with numbness or weakness, difficulty speaking or loss of vision. The NHS says a bleed on the brain may be more likely when lifting something heavy. Don't drive yourself to A&E.
Ask for an urgent GP appointment or call NHS 111
Ask for an urgent GP appointment or get help from NHS 111 for a headache that's triggered or made worse by coughing, sneezing, bending down or exercising. In the US, contact your doctor or urgent care.
During any session
Stop straight away if you feel any pain or become unwell, the NHS says, and contact 111 if your symptoms worry you or don't go away.
A dull ache in your muscles for a day or two after something new is normal. Joint pain that's sharp, gets worse during a set or lingers into the next day means switching to the easier option, and seeing a GP or physiotherapist if it carries on (our plans' rule). Our muscle soreness guide has more.
Check first
Speak to your GP first if you haven't exercised for some time or have medical conditions or concerns, as the NHS advises. Get advice before heavy lifting or hard straining work if your blood pressure is uncontrolled, or you have heart disease or chest pain when you're active, a pacemaker or defibrillator, diabetic eye disease, glaucoma, a hernia, recent eye or tummy surgery, or you're pregnant, as our breathing guide lists. After a recent shoulder dislocation or shoulder surgery, follow our shoulder dislocation guide or your surgical team first.
After heart surgery through the breastbone, or a heart or lung transplant, follow your surgeon's advice before pushing, pulling or lifting with your arms.
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Hernia
See a GP if you think you have a hernia, a bulge or lump that may get bigger when you strain and smaller when you lie down. Get help from NHS 111 if you have a hernia and pain in or around it, a bloated tummy, you feel or are sick, you're vomiting blood or your vomit looks like coffee grounds, you're constipated, you have a high temperature or feel hot, cold or shivery, or you've suddenly become confused. Call 999 or go to A&E for a femoral hernia (a small lump at the top of your thigh, in your groin) with very bad tummy pain, sickness, being unable to fart or poo, a high temperature or sudden confusion.