Understanding persistent cough after COVID‑19

How long can a cough last after COVID-19?

After COVID‑19, the airways can stay irritated for some time. This is a common reason why people have a lingering cough after the initial illness has passed.

Recovery timeframes vary from person to person. For many, a lingering cough begins to ease within a few weeks. For others, it can persist for several months and fluctuate from day to day. There is no single pattern that applies to everyone.

In a large prospective study of adults with a persistent post-COVID cough that lasted over three weeks, the median cough duration was eight weeks. Nine out of ten people from that study saw relief by 32 weeks, but a smaller group still had symptoms for more than one year.

If you are unsure whether your cough is getting better, it can be helpful to speak to your healthcare provider. Keeping a simple note of when your cough happens, how long it lasts, and how it affects your day can help guide your conversation with them.

Lingering cough vs. chronic cough: what’s the difference?

People may use terms like “lingering cough,” “persistent cough,” and “chronic cough” in the same way, but they mean different things.

• A lingering or persistent cough after COVID‑19 usually refers to coughing that continues during recovery, and it can slowly improve as the airways heal, usually between 3 to 8 weeks.
• A chronic cough is a medical term that healthcare providers may use when a cough lasts 8 weeks or longer, and it’s often caused by an underlying condition.

Some people may describe having a persistent or chronic cough after COVID‑19, but only a healthcare provider can determine how a cough should be classified.

Coughing is one of many symptoms that has been reported as part of Long COVID, but experiences vary between individuals. Symptoms can persist, change, and sometimes come and go over time. For a bigger picture on long-term symptoms after COVID‑19, read Understanding Long COVID & post-COVID complications.

Why is my cough worse at night after COVID-19?

Nighttime coughing can be a common concern for people with respiratory infections, including COVID-19.

Several reasons can explain why a cough may feel worse at night:

• Lying down can make postnasal drip more noticeable for some people, where mucus from the sinuses and throat collects at the back of the throat, and can trigger a wet or phlegmy cough if mucus lands on the vocal cords, or you inhale some mucus and it enters the lungs
• The air may be drier or cooler in the evening which makes secretions thicker

If nighttime coughing regularly interferes with your sleep, discussing this with a healthcare provider can help put symptoms into context.

What may help relieve a persistent cough?

A lingering cough can be frustrating, and what helps can vary. Some common approaches that may help include:

• Staying well hydrated throughout the day and soothing your throat by drinking a warm beverage
• Taking small sips of liquid if you feel yourself starting to cough
• Breathing in more through your nose, as breathing air in through the mouth can trigger a cough

Recovery looks different for everyone. If you are not sure what to do next, talking to a healthcare provider can help you decide on the appropriate course of action, such as taking cough medication or trying other cough treatments.