Colds and flu commonly cause blocked, muffled ears because the infection inflames the Eustachian tube, the small passage connecting the middle ear to the back of the throat. Cold, dry winter air makes this worse by thickening mucus, making it harder for the tube to open and drain properly, which is why ear fullness and muffled hearing feel so much more common in the colder months.

If your ears have felt blocked or underwater during a recent cold, you are far from alone. This is one of the most common winter ear complaints, and in most cases it is a straightforward, temporary side effect of the illness rather than anything to worry about. Here is what is actually happening, how to ease it, and how to tell if something needs a closer look.

Book an ear check with Waxy Clear if a blocked feeling is not clearing up on its own.

Why colds and flu block your ears

The Eustachian tube runs between your middle ear and the back of your throat, and its main job is to equalise pressure and drain fluid from the ear. When you catch a cold or flu, the lining of this tube becomes inflamed and swollen, just like the lining of your nose and throat. This swelling narrows or blocks the tube, stopping air from reaching the middle ear properly and creating a mild vacuum effect that pulls slightly on the eardrum.

The result is that familiar feeling of fullness or pressure, and sound that seems muffled or distant, as though you are hearing everything through water.

Common symptoms to expect

During a cold or flu, blocked ears typically come with:

• A feeling of fullness or pressure in one or both ears
• Muffled or distant sounding hearing
• Mild discomfort, though usually not sharp pain
• Occasionally, mild dizziness or a popping or crackling sensation
• Symptoms that ease gradually as the cold itself improves

These symptoms usually track alongside your other cold or flu symptoms and tend to improve as your congestion clears, though ear symptoms can sometimes linger a little after the worst of a cold has passed.

Why winter makes it worse

Cold, dry air has a direct effect on the Eustachian tube beyond the illness itself. Dry conditions thicken the mucus in the nasal passages and around the Eustachian tube openings, making it harder for the tube to open and close as it should. This increases the risk of fluid building up in the middle ear, and raises the likelihood of a minor ear infection developing on the back of a cold, particularly in children, whose Eustachian tubes are naturally shorter and sit more horizontally, making it easier for germs to travel there in the first place.

Spending more time indoors with heating running, which further dries the air, and more viruses circulating generally, both add to why winter months see a noticeable rise in blocked ear complaints.

Safe ways to ease blocked ears at home

Most blocked ears linked to a cold will resolve on their own as the illness clears, but a few gentle techniques can help speed things along and ease discomfort in the meantime:

• Swallowing, yawning or chewing sugar-free gum, which naturally encourages the Eustachian tube to open
• A gentle Valsalva manoeuvre, pinching your nose and blowing out gently with your mouth closed, stopping as soon as you feel a pop, and never forcing it
• Inhaling steam or using a warm compress to loosen mucus and ease congestion
• Using a humidifier at home to stop the air drying out your nasal passages and Eustachian tubes further
• Staying well hydrated, which helps keep mucus thinner and the Eustachian tubes functioning properly
• Using a saline nasal spray to help reduce congestion at the source

Avoid inserting cotton buds or anything else into the ear itself, since this does nothing for Eustachian tube congestion and risks pushing earwax further in or damaging the ear canal.

When it might be more than a cold

Most blocked ears from a cold clear up within one to two weeks alongside the illness itself. It is worth seeing a GP if:

• Symptoms last longer than two weeks
• You develop sharp or worsening ear pain rather than mild pressure
• You notice fluid discharge from the ear
• You develop a fever alongside ear pain
• Your hearing does not start to improve once the cold itself has cleared

These can be signs of a middle ear infection, known as otitis media, which sometimes develops when fluid trapped behind the eardrum by a blocked Eustachian tube becomes infected. This is more common in children but can affect adults too, and is straightforward to treat once identified.

Could it actually be earwax?

Cold-related ear blockage and earwax buildup can feel remarkably similar, both producing that same muffled, underwater sensation, but they need very different approaches. A cold-related blockage from Eustachian tube congestion should ease on its own as the illness passes. Earwax buildup will not resolve by itself and needs a proper wax check and removal.

If a blocked feeling started well before you caught a cold, or has continued for some time after everything else has cleared up, earwax buildup is worth ruling out rather than assuming it is still down to the cold itself.

Get in touch with Waxy Clear if your ears are still feeling blocked once your cold has gone.

Frequently asked questions

Why do my ears feel blocked when I have a cold? Colds cause inflammation in the Eustachian tube, the passage connecting your middle ear to your throat, which blocks normal airflow and drainage and creates a feeling of fullness or pressure.

Why does this seem worse in winter? Cold, dry air thickens mucus around the Eustachian tube, making it harder for the tube to open and drain properly, and increases the risk of fluid buildup and minor ear infections following a cold.

How long should blocked ears from a cold last? Most cases clear up within one to two weeks as the cold itself resolves. See a GP if symptoms last longer than two weeks or worsen rather than improve.

Is it safe to try to pop my ears myself? A gentle Valsalva manoeuvre, swallowing or yawning can help, but should always be done gently. Never force it, and stop as soon as you feel relief or a pop.

How can I tell if it is a cold or earwax causing the blockage? A cold-related blockage should ease as your other symptoms improve. If the blocked feeling started before your cold, or lingers well after everything else has cleared, earwax buildup is worth checking for separately.