Yes, the infection can raise your pulse during illness and recovery, but chest pain, fainting, or severe breathlessness need urgent care.
A racing pulse can feel scary when you’re sick with COVID-19. A higher heart rate can happen during the infection, and it can also linger for some people after the fever, cough, or sore throat fades.
Most short-term spikes come from the body working harder. Fever, poor sleep, dehydration, pain, coughing, low oxygen, and extra strain on the heart can all push the pulse up. A smartwatch may catch it before you feel it, which can make the number feel louder than the symptom itself.
The safer move is to read the pulse in context. A single high reading after climbing stairs means less than a resting pulse that stays high, keeps returning, or comes with chest pain, fainting, blue lips, or severe breathlessness.
Why Your Pulse Can Rise During Infection
When the body fights a virus, the heart often beats faster to move blood, heat, oxygen, and immune cells. Fever alone can lift the pulse. So can fluid loss from sweating, poor intake, diarrhea, or breathing through the mouth all night.
COVID-19 can add another layer because it may affect the lungs, blood vessels, and heart rhythm in some people. A mild case can still make your pulse jump during normal tasks. A harder case may leave you winded after a shower or a short walk.
Many people describe the feeling as pounding, fluttering, skipping, or a sudden rush in the chest. The CDC list of long COVID symptoms includes fast-beating or pounding heart, often called palpitations, along with shortness of breath and chest pain.
What Counts As A High Reading?
For many adults, a resting pulse from 60 to 100 beats per minute is common. During fever or illness, a number above your normal baseline may appear. The pattern matters more than one reading.
If your usual resting pulse is near 62 and it sits at 92 while you’re feverish, that rise may fit the illness. If it sits at 120 while you’re lying down, or it jumps sharply each time you stand, that deserves closer medical review.
Numbers can also be misleading. Watches and phone sensors may read poorly when the skin is cold, the strap is loose, or your arm is moving. Check manually at the wrist or neck for 30 seconds and double it, then write down the number with symptoms and activity.
Higher Heart Rate After Covid: Patterns To Watch
A higher heart rate after Covid can show up in a few patterns. Some people feel fine at rest, then their pulse shoots up when they stand. Others get a pounding feeling at night, after meals, or after a small errand.
That doesn’t prove heart damage. Recovery can bring deconditioning, low fluid intake, poor sleep, lingering inflammation, or autonomic changes, which means the body’s automatic controls for pulse and blood pressure are off balance. The American Heart Association has described rhythm issues and autonomic problems after infection in its scientific statement on COVID-19 and arrhythmias.
Use the table below to sort common pulse patterns. It’s not a diagnosis chart, but it can help you decide what to track and when to ask for care.
Read the trend beside fever, fluids, sleep, medicines, and oxygen readings. A pulse number alone rarely tells the full story, but a pattern across several hours gives cleaner clues.
| Pulse Pattern | Possible Reason | Next Step |
|---|---|---|
| Higher pulse during fever | Body heat and immune activity raise demand | Drink fluids, rest, track temperature and pulse together |
| Fast pulse after standing | Fluid loss, bed rest, or autonomic changes | Record lying and standing readings, then call a clinician if it repeats |
| Pounding after small tasks | Deconditioning, lung strain, or poor oxygen exchange | Scale activity down and watch for breathlessness or chest pain |
| Skipped beats or fluttering | Palpitations, rhythm changes, caffeine, or poor sleep | Track timing, triggers, and whether dizziness appears |
| Resting pulse over 120 | Fever, dehydration, rhythm issue, or added strain | Seek same-day medical advice, sooner if other symptoms appear |
| Fast pulse with chest tightness | Heart, lung, clot, or oxygen problem | Get urgent care, especially with sweating, faintness, or pain spreading |
| Pulse rises after returning to exercise | Too much effort too soon | Step back, use lighter activity, and increase only when symptoms stay quiet |
| Nighttime racing | Fever, reflux, poor sleep, medicines, or rhythm changes | Write down the time, pulse, medicines, and any breathing symptoms |
When A Fast Pulse Needs Care
Some pulse changes are part of being ill. Others are warning signs. Call emergency services or go to urgent care if a racing heart comes with sudden chest pain, fainting, new confusion, blue lips, coughing blood, or breathlessness so bad you can’t speak short sentences.
The NHS COVID-19 medical help page lists sudden chest pain, fainting, and severe breathlessness as reasons to seek emergency help. Those signs matter because they can point to low oxygen, a rhythm problem, heart inflammation, a blood clot, or another urgent illness.
Call your regular clinician soon if your resting pulse stays above your usual range for several days after the fever ends, if palpitations keep waking you, or if standing causes repeated dizziness. The same advice fits anyone with known heart disease, pregnancy, diabetes, kidney disease, immune problems, or past blood clots.
| Symptom Pairing | Care Level | Why It Matters |
|---|---|---|
| Fast pulse plus mild fever | Home tracking unless it climbs or feels severe | Fever often raises pulse while the body fights infection |
| Fast pulse plus chest pain | Urgent or emergency care | Heart, lung, or clot problems need prompt checks |
| Fast pulse plus fainting | Emergency care | Blood pressure or rhythm may be unstable |
| Fast pulse plus oxygen below your care plan range | Urgent care | Low oxygen can make the heart work harder |
| Fast pulse during recovery walks | Slow activity plan and clinician call if it repeats | The body may not be ready for the old pace |
How To Check Your Heart Rate Without Chasing Every Beat
Pick a calm time to measure. Sit still for five minutes, breathe normally, and keep both feet on the floor. Then count the pulse for 30 seconds and double it. Log the number, time, temperature, oxygen reading if you have one, and what you were doing before the check.
Do not measure every few minutes. That can turn a normal rise into a worry loop. Two or three readings a day during illness is usually enough unless your care team gave you a different plan.
A Simple Log To Bring To A Visit
- Resting pulse after five minutes seated.
- Pulse after standing for one and three minutes.
- Temperature and oxygen reading, if available.
- Symptoms at the same time, such as chest pain, dizziness, cough, or breathlessness.
- Medicines, caffeine, alcohol, and missed meals.
- Activity that happened before the pulse rose.
This kind of log gives a clinician cleaner clues than a loose stream of watch alerts. It can point toward dehydration, fever, medication effects, rhythm changes, or a recovery pace that is too hard for your current state.
Safer Activity After A Racing Pulse
If your pulse is high while you still have fever, chest symptoms, or heavy fatigue, pause workouts. Short walks to the bathroom or kitchen are enough for many people during the sickest stretch.
When symptoms ease, restart gently. Try light walking, stretching, or normal chores before formal exercise. If your pulse jumps and stays high, or if breathlessness feels out of proportion, stop and try again another day at a lower level.
What To Ask Your Clinician
Bring clear questions, not a pile of numbers. Ask whether your pattern fits recovery, dehydration, a rhythm issue, medication side effects, anemia, thyroid trouble, or lung strain. Your clinician may order an ECG, blood work, oxygen checks, or a wearable heart monitor based on your story.
The main takeaway: COVID-19 can raise heart rate, and many cases settle as the body heals. Treat the number as one clue, not the whole story. If the pulse is high at rest, keeps returning, or arrives with warning signs, get medical care instead of waiting it out.
References & Sources
- Centers for Disease Control and Prevention (CDC).“Long COVID Signs and Symptoms.”Lists fast-beating or pounding heart, chest pain, and shortness of breath among reported long COVID symptoms.
- American Heart Association.“Cardiac Arrhythmias and Autonomic Dysfunction Associated With COVID-19.”Reviews rhythm issues and autonomic dysfunction linked with infection and recovery.
- NHS.“COVID-19 Symptoms and What To Do.”States when symptoms such as sudden chest pain, fainting, or severe breathlessness need emergency help.
Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.