Chamomile tea won’t cure a cold, but it can ease several of the symptoms that make you miserable while your body fights off the virus. Its natural anti-inflammatory compounds help reduce swelling in irritated airways, and the warm liquid itself supports hydration and loosens congestion. For a remedy with virtually no side effects for most people, it pulls a surprising amount of weight during a typical cold.
How Chamomile Works Against Cold Symptoms
The key player in chamomile is a plant compound called apigenin, along with related molecules. These compounds dial down your body’s inflammatory response, which is responsible for much of the misery you feel during a cold. When your immune system detects a virus, it floods the affected area with inflammatory signals that cause swelling, mucus production, and that raw, achy feeling in your throat and sinuses. Apigenin helps suppress several of these signals, including the ones that drive swelling and recruit more immune cells to already-inflamed tissue.
Lab studies show chamomile can reduce the production of nitric oxide, a molecule that fuels inflammation, by 53 to 83 percent depending on concentration. It also lowers levels of a protein called ICAM-1 that helps immune cells stick to and infiltrate inflamed tissue, reducing it by up to about 53 percent. These aren’t cold-specific studies, but they explain why chamomile has been used for centuries to soothe irritated airways and calm swollen tissues.
Chamomile essential oil has also demonstrated strong antiviral activity in lab settings, reducing herpes virus replication by over 96 percent. That doesn’t translate directly to fighting cold viruses in your body, but it does confirm that chamomile’s medicinal properties go beyond simple comfort.
What It Actually Does for Your Symptoms
The most immediate benefit is simple: warm liquid soothes a sore throat, and steam from a hot cup helps open congested nasal passages. But chamomile adds a layer beyond what plain hot water offers. A randomized, double-blind clinical trial on patients with chronic sinus inflammation found that chamomile extract significantly improved symptoms and quality of life compared to a placebo. Patients using chamomile scored meaningfully better on a standardized symptom questionnaire, and doctors confirmed visible improvement during nasal exams.
That study involved chronic sinus problems rather than an acute cold, but the underlying mechanism is the same: inflamed, swollen nasal and sinus tissue producing excess mucus. Chamomile’s anti-inflammatory action targets exactly that process.
Beyond the nose and throat, chamomile acts as a mild sedative. Sleep is one of the most effective things your body needs to recover from a cold, and chamomile’s calming effect can help you rest more easily, especially when congestion and discomfort keep you awake at night.
Signs It May Boost Immune Function
A small but notable study had 14 volunteers drink five cups of chamomile tea daily for two weeks. Researchers collected urine samples throughout the study period and found a significant increase in two compounds: hippurate and glycine. Both are associated with increased antibacterial activity in the body. The elevated levels persisted for up to two weeks after participants stopped drinking the tea, suggesting the immune-supporting effects aren’t just temporary.
This doesn’t mean chamomile tea will prevent you from catching a cold. But if you’re already fighting one, a few cups a day may give your immune system a modest edge while simultaneously managing your symptoms.
How to Get the Most From It
Steep chamomile tea for at least five minutes with a lid or cover over the cup. The compounds responsible for its anti-inflammatory effects are released more fully with longer steeping, and covering the cup prevents the volatile oils from escaping with the steam. Drinking three to four cups spread throughout the day keeps a steady supply of those compounds in your system and contributes meaningfully to your fluid intake, which matters when you’re losing moisture through a runny nose, mouth breathing, and mild fever.
Adding honey (for adults and children over one year old) coats the throat and has its own mild antibacterial properties. A squeeze of lemon adds vitamin C and makes the drink more palatable if you’re dealing with a dulled sense of taste. Inhaling the steam before you sip is worth doing deliberately, holding the cup near your face and breathing through your nose for 30 seconds or so to let the warm, moist air loosen congestion.
Who Should Be Cautious
Chamomile belongs to the same plant family as ragweed, chrysanthemums, and daisies. If you’re allergic to any of these, chamomile can trigger a reaction ranging from mild itching to severe anaphylaxis. A case reported in JAMA described a woman who developed generalized hives, throat swelling, and airway obstruction within 20 minutes of drinking chamomile tea. This is rare, but if you’ve never had chamomile before and you know you’re allergic to ragweed, try a very small amount first or skip it entirely.
If you take a blood thinner like warfarin, chamomile deserves extra caution. It contains natural coumarin compounds that may amplify the drug’s blood-thinning effect. A published case report described a 70-year-old woman on warfarin who was hospitalized with internal bleeding after using chamomile tea and chamomile lotion to treat upper respiratory symptoms. The combination likely pushed her anticoagulation to dangerous levels.
For infants and young children, the guidance is more nuanced. Babies under six months should stick to breast milk or formula when sick. For children six months and older, diluted chamomile tea is generally considered safe in small amounts. Children’s Nebraska, a pediatric hospital, lists diluted chamomile tea among safe home remedies for infants. However, honey should never be added to any drink for a child under one year due to the risk of infant botulism.