Apple Watch Vitals Out of Range: What to Do

Your Apple Watch sent you a Vitals notification, and you wonder what it means. This text explains which values the app shows, when the notification comes and what Apple leaves open. You can note the next days on paper or in the symptom diary in Sam. Sleep, resting heart rate and heart rate variability from Apple Health sit in the same app.

A Vitals notification means that, per Apple, at least two of your overnight metrics were outside your typical range. It is not a diagnosis, and Apple's support pages name no value at which to see a doctor. Note the next seven nights, and talk to your practice if it repeats or call earlier if you feel ill.

What is written here about the app comes from Apple's support pages and applies as Apple describes it. This text is general information and does not replace medical advice. Only your practice can place a value in context for you.

What does the Vitals app show?

Per Apple, the app shows your overnight metrics: heart rate, respiratory rate, wrist temperature, blood oxygen and sleep duration. You use them to understand your daily health status better.

On Series 12 and Ultra 4, per Apple, you see heart rate variability instead of sleep duration. There are also daytime values: heart rate and heart rate variability.

On the watch you see the overnight values for the last seven days. On the iPhone you open Health, tap Browse, then tap Vitals. One note for US models: if bought on or after 18 January 2024 with a part number ending LW/A or LS/A, blood oxygen is missing from the app, per Apple.

When does the watch send the notification?

By default, per Apple, you get a notification when at least two of your overnight metrics are outside your typical range. A single value is not enough in that setting. The notification comes with context for factors that may be involved.

On the watch, tap Overnight Vitals in the app, then tap More Info. Per Apple, you find out there what it means when values are within the typical range, and how a metric changed against your recent history.

What does "outside your typical range" mean?

Per Apple, the app sets a typical range for each health metric, from sleep and from the day. Apple's support pages do not say how the app computes the range. If you see a fixed number somewhere, check whether it comes from Apple.

They also do not say how many nights or days the app needs for the range.

Wrist temperature has a special rule, per Apple. Sleep tracking must run at least 4 hours each night, and data appears after about 5 nights. Your body temperature naturally fluctuates from night to night, and the sleep environment can shift wrist temperature.

Which factors does Apple itself name?

With the notification, per Apple, you get context for possible factors. Apple gives examples: medications, elevation changes or illness. A list of possible factors is not an explanation of your night.

Apple adds one point about the fit. The back of the watch needs skin contact, for example for the heart rate sensor and blood oxygen. Worn neither too tight nor too loose, the sensors work best, per Apple.

What does Apple not say, and what does that mean for you?

Apple's support pages leave things out. They do not give the thresholds used, the number of nights the app needs, or a value at which Apple advises a doctor visit.

They do carry one clear sentence: the Apple Watch is not a medical device. A notification is a reason to look closer, not a finding. Whether watches can show illness early is a separate question.

What do you write down in the days after the notification?

A notification alone is hard to place. With the circumstances beside it, it is easier. Take seven nights, as many as the watch shows in its overview, and stop after. Look at the values once in the morning, not several times a day.

Once at the top of the page:

• Watch model and watchOS version.
• Whether sleep tracking runs each night.
• How the watch sits.

For the day and each of the seven nights (the night of the notification, three before, three after):

• Date.
• Which values the notification names.
• Infection or illness, yes or no.
• A new or changed medicine, with name and date.
• Travel, a change of place or altitude.
• Alcohol or a late meal.
• Sleep environment: warm, cold, an unfamiliar bed.
• Watch loose or too tight.
• How you feel in the morning, from 0 to 3.

Medicine, altitude, illness, sleep environment and fit are points Apple names. Alcohol, a late meal and how you feel are yours to add. With medicine you only note what is. Whether and how you take it is a conversation with your practice.

In Sam you use the symptom diary to note how each day goes and which complaints you have. Sleep, resting heart rate and heart rate variability from Apple Health show in a view of their own, not next to the entry. Travel, sleep environment and watch fit stay on your side. After seven nights, read the page once. If values return to the range after a night or two, the record shows that.

When does the record belong at the practice?

If the notification repeats over weeks, take your record to the practice. If you feel ill or something worries you, call earlier. Bring your page, if you like a screenshot of the Health view, and your medication list. Ask: "Is this relevant for my situation?" The answer comes from your practice.

With chest pain or shortness of breath, call your local emergency number (112 in the EU, 999 in the UK, 911 in the US), whatever the notification says. After fainting, call if you are not fully clear within a minute, you are injured, it happened during exertion or while lying down, or chest pain, shortness of breath or a racing heart follow. If you recover quickly, call your practice the same day.

Turn the notifications back on

If you turned off Vitals notifications, you can switch them back on, per Apple. Open the Settings app on the Apple Watch, tap Vitals, and turn on Notifications. Apple only describes switching them back on, not turning them off.

Note your days in Sam and look at what changes

Instead of a notification you cannot place, you get a dated entry for each day.

• Instead of screenshots of Apple's chart: in the symptom diary you enter how you feel.
• Instead of a notes app: sleep, resting heart rate and heart rate variability come from Apple Health. You do not copy them down, and you see how they move against your own baseline.
• Instead of Apple Health alone: Apple Health shows the values, and in Sam you add how those days felt.

Sam does not give a diagnosis. You decide what you show the practice.

Try Sam Health

Sam is a wellness companion, not a medical device. The app does not diagnose, treat, cure or prevent any condition or health state. Always consult qualified professionals for medical decisions.

Related reading

• Apple Watch sleep apnea notification: what to do
• Apple Watch high heart rate notification at rest
• An overview of the sensors in the Apple Watch
• How to bring wearable data to the doctor

Sources

Updated: October 2026

• Apple Watch User Guide: Track your vitals on Apple Watch (watchOS 27)
• Apple Watch User Guide: Track your nightly wrist temperature on Apple Watch (watchOS 27)
• NHS: Fainting (last reviewed 17 August 2026)
• NHS: Heart palpitations (last reviewed 17 March 2026)
• Apple: watchOS feature availability