The fever broke. The runny nose stopped. But there it is β that stubborn, sticky feeling in the back of your throat. You clear your throat, but it comes right back. You cough, but it doesn't budge.
What is that stuff, and why won't it go away?
What's happening in your body?
That sticky feeling is phlegm (or sputum) β a thick mucus produced by your respiratory tract. During a cold, your body ramps up mucus production to trap and expel viruses. Even after the acute infection has passed, your respiratory tract may still be inflamed, producing extra mucus as part of the healing process.
How long does it normally last?
For most people, post-cold phlegm lasts anywhere from a few days to two weeks. If it persists longer than that, there might be another factor β like residual inflammation, sinus drainage, or even acid reflux masquerading as a throat issue.
What actually helps?
Hydration is the most overlooked solution. Hot water, herbal tea, or warm broth help thin the mucus, making it easier to clear. Honey in warm water is particularly effective β it's both hydrating and has natural antibacterial properties.
Steam is also excellent. A hot shower or bowl of steaming water can loosen phlegm and soothe irritated airways.
Expectorants like guaifenesin (found in many over-the-counter cough medicines) can also help thin mucus.
What to avoid?
Dairy doesn't actually increase phlegm production, despite the old wives' tale. But it can make existing phlegm feel thicker for some people, so if you're struggling, try cutting it for a couple of days.
Avoid smoke and strong irritants. And for the love of your throat, don't shout or clear your throat aggressively β it irritates the vocal cords and can make recovery slower.
When to see a doctor?
If the phlegm persists beyond three weeks, is accompanied by fever, has blood in it, or is making it hard to breathe, it's time to get checked out.
Other than that, your body is just finishing its cleanup. Give it time, hydration, and rest.