Yes, warm liquids provide real, measurable relief for a sore throat. A study published in the journal Rhinology found that a hot drink delivered immediate and sustained relief from sore throat, chills, and tiredness, while the same drink served at room temperature did not help with those symptoms. The effect is partly physical and partly comfort-driven, but either way, the relief is consistent enough that warm beverages remain one of the most practical home remedies available.
Why Warm Liquids Work
Warm liquids help a sore throat through a few overlapping mechanisms. First, heat stimulates saliva production and increases secretions in the airway. Saliva is your throat’s natural lubricant, and when you’re sick, mouth breathing, or dehydrated, your throat dries out and the raw, irritated tissue feels worse. A warm drink coats and moistens the area, which directly reduces that scratchy, painful sensation.
Second, warm liquids help move mucus. A classic study from Mount Sinai Medical Center measured how fast nasal mucus travels before and after drinking hot fluids. Sipping hot water increased mucus velocity from 6.2 to 8.4 millimeters per minute, and hot chicken soup pushed it even higher, from 6.9 to 9.2 millimeters per minute. That matters because thick, stagnant mucus dripping down the back of your throat (postnasal drip) is one of the most common causes of sore throat pain during a cold. Thinning and moving that mucus along means less irritation.
Third, inhaling steam from a warm drink adds moisture to inflamed nasal and throat passages. The researchers in the mucus study concluded that nasal inhalation of water vapor accounted for part or all of the improvement in mucus clearance. So the steam rising off your mug isn’t just comforting. It’s doing something measurable.
Warm vs. Cold: Which Is Better?
This depends on the type of pain you’re feeling. Warm liquids are generally better for loosening mucus, reducing coughing, and soothing the back of the throat. Cold liquids and frozen treats like popsicles or ice chips are better at numbing sharp, inflammatory pain, the kind where your throat feels like it’s on fire and swallowing is miserable.
Cleveland Clinic’s guidance is straightforward: try both and see what works best for you. If your throat is raw and swollen from something like strep or tonsillitis, cold may feel more relieving. If you’re congested and dealing with postnasal drip from a cold or flu, warm liquids will likely do more good. There’s no rule that says you have to pick one. Alternating between warm tea and cold popsicles throughout the day is perfectly fine.
One thing worth noting: cold water actually slowed mucus velocity in the Mount Sinai study, dropping it from 7.3 to 4.5 millimeters per minute. So if congestion is part of the picture, cold drinks could temporarily make that component worse.
Best Warm Drinks for a Sore Throat
The specific liquid matters less than the temperature and the act of sipping. That said, some options pull more weight than others:
- Warm water with honey. Honey coats the throat and has mild antimicrobial properties. Multiple studies have found it reduces cough frequency, which in turn gives your irritated throat a break from the repeated trauma of coughing.
- Chicken soup or broth. In the mucus clearance study, hot chicken soup outperformed plain hot water. The combination of warmth, steam, salt, and liquid makes broth one of the most effective options.
- Herbal tea. Chamomile and ginger teas are popular choices. The warmth does the heavy lifting, but staying hydrated with any caffeine-free liquid supports your body’s ability to thin secretions and fight infection.
- Warm water with lemon. The acidity can help cut through mucus, and the vitamin C, while not a cure, supports immune function in small ways.
Caffeinated drinks like coffee or black tea are fine in moderation, but caffeine is a mild diuretic. When you’re sick, hydration matters more than usual, so balance caffeinated options with plenty of water or herbal alternatives.
How Hot Is Too Hot?
There’s a real upper limit. The International Agency for Research on Cancer classified beverages consumed at or above 65°C (149°F) as probably carcinogenic, based on evidence linking very hot drinks to esophageal damage over time. That classification came primarily from studies on maté, a tea traditionally consumed at 70°C or higher in parts of South America.
Most people in North America and Europe drink their tea and coffee between 54 and 62°C (roughly 130 to 144°F), which falls below that threshold. Food scientists recommend a serving range of 130 to 160°F (54 to 71°C) to balance comfort and safety. In practical terms, if you brew a cup of tea and let it sit for a few minutes before sipping, you’re almost certainly in a safe range. If it burns your lips, it’s too hot. Let it cool.
When your throat is already inflamed, scalding liquid will make things worse, not better. Comfortably warm is the goal.
How Long the Relief Lasts
The soothing effect of warm liquids is real but temporary. The mucus clearance study found that improvements returned to baseline within about 30 minutes. The Rhinology study described the relief from hot drinks as “immediate and sustained,” but this still refers to the period during and shortly after drinking, not hours later.
This means the most effective strategy is frequent sipping throughout the day rather than one big cup in the morning. Keeping a thermos of warm broth or tea nearby and taking small sips every 15 to 20 minutes will maintain the lubricating and mucus-thinning effects more consistently than drinking a full mug all at once and waiting several hours for the next one. This approach also helps with hydration, which is one of the most important things you can do for any upper respiratory infection.