How Long Does Conjunctivitis Last? By Type & Treatment

Waking up with a gritty, red eye is never fun — and the first question most people ask is how long they’ll have to deal with it. The answer isn’t one-size-fits-all: whether it’s viral, bacterial, or allergic makes a big difference. According to the CDC, viral conjunctivitis resolves in 7-14 days without treatment, while bacterial cases clear in just 2-5 days when antibiotics are used. This guide walks through each type’s timeline so you know whether to ride it out at home or head to the GP.

Viral conjunctivitis duration: up to 2 weeks · Bacterial with treatment: 2-5 days · Without treatment: few days to weeks · Contagious period: while eyes red/discharge

The table below summarises the key clinical parameters to help you decide whether home care or a GP visit is appropriate.

How long does conjunctivitis last without treatment?

Going without treatment doesn’t mean symptoms drag on forever — but the timeline depends entirely on which type you have. Viral conjunctivitis is self-limiting, meaning your immune system eventually clears it without medication, according to the CDC. Bacterial cases are different: they may resolve on their own, but antibiotics significantly shorten how long you’re contagious and dealing with discharge.

Viral type duration

• Typical viral conjunctivitis lasts 7-14 days without treatment (CDC)
• Severe cases can stretch to 3 weeks (CDC)
• Incubation period is 1-3 days before symptoms appear (My Clarity Eyecare)

Bacterial type duration

• Untreated bacterial conjunctivitis typically resolves in 7-10 days (Dr Parth Shah)
• Mild cases may improve within 2-5 days even without antibiotics (CDC)
• Severe untreated cases can last up to 2 weeks (CDC)

Allergic type duration

• Allergic conjunctivitis clears when the allergen is removed or antihistamines take effect — typically days to a week (Cleveland Clinic)
• Chronic allergic cases may persist until underlying allergies are managed

How long does bacterial conjunctivitis last?

Bacterial conjunctivitis is the type that responds fastest to treatment — but it’s also the kind that’s most likely to spread to others, especially in households or classrooms. The CDC confirms that antibiotics shorten the infection and reduce transmission risk.

With antibiotic drops

• Symptoms improve within 24 hours of starting antibiotics (Healthline)
• Full clearance in 2-5 days with consistent use (CDC)
• Complete the full course even if eyes look better after 2-3 days — stopping early risks a rebound infection (Rexoneye)

Without antibiotics

• Untreated bacterial conjunctivitis may take up to 2 weeks to fully resolve (CDC)
• You’re contagious for the entire duration — roughly 7-10 days on average (Dr Parth Shah)

In children

• Bacterial conjunctivitis is more common in children and often presents with yellowish discharge (Rexoneye)
• Symptoms typically develop within 24-48 hours of exposure (Memorial Vision)
• Children should stay home until discharge clears or a GP confirms it’s safe to return

Does conjunctivitis go away by itself?

The short answer is yes for most viral cases, but “by itself” doesn’t mean “ignore it.” The CDC notes that viral conjunctivitis is self-limiting — your body handles it. The catch is that you’re contagious the whole time, and without hygiene precautions, you’ll keep reinfecting yourself or spreading it to housemates.

Viral cases

• Viral conjunctivitis typically resolves in 1-2 weeks without treatment (East Sussex Healthcare NHS Trust)
• No antiviral drops exist for standard adenovirus (the most common cause) — supportive care with artificial tears is the standard approach (NCBI StatPearls)
• Cold compresses and good hygiene (washing hands frequently) help manage symptoms

Bacterial cases

• Bacterial cases may resolve without antibiotics, but the CDC notes that antibiotics shorten the contagious period and reduce complications
• If symptoms haven’t improved after 3-4 days, see a GP — you may need a prescription (Rexoneye)

When not to wait

• Contact a GP if you experience pain lasting more than 2 days — this is a red flag for a more serious infection (HSE Ireland)
• Newborns with conjunctivitis symptoms need immediate medical attention, regardless of type
• Vision changes, sensitivity to light, or severe redness warrant urgent care

How to tell if your conjunctivitis is bacterial or viral?

Discharge colour is the most reliable clue, according to most medical sources. The Mayo Clinic Health System notes that symptoms improve within days to 2 weeks depending on cause — but identifying which cause you’re dealing with shapes whether you wait it out or book a GP appointment.

Symptom differences

• Thick yellow or green discharge typically indicates bacterial infection (Rexoneye)
• Watery, clear discharge is more common with viral or allergic conjunctivitis (Memorial Vision)
• Viral often follows a cold or sore throat — if you had a recent respiratory infection, viral is more likely (East Sussex Healthcare NHS Trust)

Discharge type

• Bacterial discharge tends to mat the eyelids together overnight
• Viral discharge is more watery and doesn’t matt as readily
• Allergic discharge is watery with prominent itching in both eyes

Duration clues

• If symptoms started 24-48 hours after exposure and involve thick discharge, bacterial is more likely (Memorial Vision)
• If symptoms appeared after a cold and have persisted beyond a week with no improvement, viral is more likely

What is the fastest way to cure conjunctivitis?

“Cure” is the wrong frame for viral — it doesn’t need curing, just managing while your immune system does the work. But for bacterial, there’s a clear fastest path: antibiotics. The CDC confirms that antibiotics shorten bacterial infections, reduce complications, and prevent spread to others.

Treatment by type

• Bacterial: Antibiotic eye drops (e.g., fluoroquinolones or aminoglycosides) — symptoms improve within 24 hours, full resolution in 2-5 days (Healthline)
• Viral: No antivirals needed for standard adenovirus — supportive care only. Artificial tears, cold compresses, and hygiene (NCBI StatPearls)
• Allergic: Antihistamine eye drops or oral antihistamines — clears within days of removing the allergen or starting treatment (Cleveland Clinic)
• Herpes simplex: The one viral exception — requires antiviral medication (ganciclovir or similar) (CDC)

Home care steps

• Wash hands frequently — especially before and after touching your eyes
• Avoid touching or rubbing the affected eye(s)
• Change pillowcases and wash towels daily
• Don’t share makeup, eye drops, or face cloths with others
• Discontinue contact lens use until symptoms fully clear

When to seek help

• If symptoms haven’t improved after 3-4 days, see a GP (Rexoneye)
• Newborns with any eye symptoms need immediate medical review
• Pain, vision changes, or light sensitivity are red flags requiring same-day care

How to treat and recover from conjunctivitis

Treating conjunctivitis isn’t complicated, but getting the right treatment for the right type matters more than most people realise. The CDC notes that most acute infectious conjunctivitis in adults is viral and self-limited — yet many patients pressure GPs for antibiotics they don’t need.

1. Identify the type. Check discharge colour and whether it mats the eyes overnight. Yellow/green = bacterial likely. Watery with a recent cold = viral likely.
2. Book a GP appointment for bacterial signs. Thick yellow discharge that mats the eyes is your cue to see a clinician. They can confirm bacterial and prescribe appropriate drops.
3. Start antibiotic drops as prescribed. Apply exactly as directed. Expect improvement within 24 hours, but complete the full course regardless.
4. For viral symptoms, manage supportively. Artificial tears, cold compresses, and rigorous hygiene. No drops will speed this up — your immune system needs time.
5. Monitor for 3-4 days. If there’s no improvement or symptoms worsen, follow up with a GP regardless of what you think the type is.
6. Prevent spread. Wash hands before and after touching your eyes. Don’t share bedding, towels, or makeup. Stay home from work or school until discharge has cleared for at least 24 hours.

For patients, the decision tree is straightforward once you know the type: bacterial gets antibiotics (and clears fast), viral gets supportive care (and clears on its own timeline). The danger isn’t the infection itself — it’s waiting too long when pain or worsening symptoms signal something beyond routine conjunctivitis. A GP visit that confirms bacterial saves you two weeks of unnecessary suffering and protects everyone around you from catching it.

“Most cases of acute, infectious conjunctivitis in adults are viral and self-limited; these cases do not require antimicrobial treatment.”— CDC (US Public Health Authority)

“Antibiotics may help shorten the length of infection, reduce complications, and prevent the spread to others.”— CDC (US Public Health Authority)

“Treatment for viral conjunctivitis is aimed at symptomatic relief and not to eradicate the self-limiting viral infection.”— NCBI StatPearls (NIH Resource)

Related reading: How to Get Rid of Scabies: Fast Treatments & Cleaning

Viral conjunctivitis often lingers up to two weeks without treatment, unlike bacterial cases that clear in days with drops, as these viral, bacterial and kids timelines clarify for adults and children alike.

Frequently asked questions