Painful Red Eye and Headache: Glaucoma Attack or Pink Eye?
Pink eye itches, feels gritty and sticks your lashes together, but it doesn’t make the eye ache deep inside or make you vomit. A painful red eye with headache, blurred vision, rainbow halos around lights or nausea can be an acute glaucoma attack, and that needs an eye hospital today, within hours. Here’s how to tell the two apart and what not to put in the eye first.
The quick sort
- Likely pink eye: gritty, itchy, watery or sticky, often both eyes, vision clears after blinking, discomfort rather than pain.
- Same-day eye hospital: deep aching pain, light hurts, blurred vision, halos, headache on the same side, nausea or vomiting, one eye much redder than the other.
- Also same day: a painful red eye in a contact lens wearer, or after an injury.
- Skip: rose water, breast milk, surma, leftover steroid drops, and pharmacy drops picked at random.
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Evening, a dim room, the television on. An aunt in her fifties gets a pounding headache over one eyebrow, then her right eye turns red and the tube light seems to wear a rainbow ring. By midnight she’s vomiting. The family calls it migraine or “gas”, someone brings rose water for the eye, and the morning is spent at a general clinic. By then an eye that could have kept its sight has lost some. That pattern, a painful red eye with headache and vomiting, is the classic acute angle-closure glaucoma attack.
What a glaucoma attack actually is
The front of the eye is filled with a clear fluid that is made all the time and drains out through a tiny filter in the angle where the coloured iris meets the clear front window (the cornea). Think of a sink with the tap running. Simple. In some eyes, usually smaller, long-sighted eyes, that angle is narrow. If the iris bunches up and blocks the drain, the tap keeps running and pressure inside the eye shoots up within hours.
High pressure squeezes the optic nerve, the cable to the brain. It doesn’t grow back. That’s why this is an emergency, and why the common, silent form of glaucoma described in our kala motia guide behaves so differently: that one steals side vision slowly without pain, while an attack announces itself loudly.
Who is more likely to have an attack
- People over about 50, and women slightly more than men.
- Long-sighted people (plus-number glasses for distance).
- People of South Asian and East Asian ancestry, who more often have narrow angles.
- Someone with a close relative who had one.
Triggers include dim light (the pupil widens and the iris bunches), stress, and some medicines, including certain cold, allergy, travel sickness, bladder and mood medicines. Eye doctors can check whether your angles are narrow, and a small laser opening can protect an at-risk eye before any attack happens.
Painful red eye vs pink eye: side by side
| Feature | Pink eye (aankh aana) | Glaucoma attack |
|---|---|---|
| Feeling | Gritty, itchy, burning | Deep, heavy ache, often severe |
| Vision | Clear after blinking | Misty, blurred, halos round lights |
| Eyes affected | Often both, one after the other | Usually one |
| Discharge | Watery or sticky, lashes glued in the morning | Tears only |
| Rest of body | Maybe a cold | Headache, nausea, vomiting |
| Pupil | Normal | Mid-sized, doesn’t shrink in light |
Pink eye is common. It usually settles in one to two weeks. Hand washing, separate towels and not sharing kajal or surma sticks stop it spreading through the house; our conjunctivitis hygiene guide covers the details.
Other painful red eyes that also need a doctor today
A glaucoma attack isn’t the only serious cause, and the general rule is that deep pain and light sensitivity point to trouble inside the eye or on its clear surface rather than in the thin outer skin that pink eye inflames. Pain is the tell.
- Corneal ulcer (keratitis): pain, a white spot on the cornea, light sensitivity. Contact lens wearers are at the highest risk, especially after sleeping or swimming in lenses. Take the lenses out and bring them with the case.
- Iritis (uveitis): an aching eye, redness in a ring around the coloured part, a small pupil, and light that hurts. It can come with back or joint problems.
- Scleritis: a boring pain that wakes you at night, deep purple-red colour, often with rheumatoid arthritis.
- Injury or a chemical splash: anything that flew into the eye, or any chemical. Chemicals need flushing with clean water straight away, before you travel.
Pain that makes you screw the eye shut against light is not pink eye.
What to do if you suspect an attack
- Cover each eye for 10 seconds and compare the vision. Note halos, blur and when it started.
- Go to an eye hospital with an emergency service within the next 1 to 2 hours if you can. If none is open, go to a general emergency department and say “painful red eye, possible angle closure”.
- Don’t put anything in the eye: no rose water, no breast milk, no surma, no old drops from the fridge.
- Bring a list or photo of every medicine you take, including cold and allergy remedies from the last few days.
- If you’re vomiting, don’t drive yourself. Take a companion.
Steroid eye drops kept from an old prescription can make an ulcer or a herpes infection much worse and can raise eye pressure. Drops that “take the red out” hide warning signs. Rose water and breast milk aren’t sterile and can carry germs onto an injured surface. Pregnant or breastfeeding? Tell the eye doctor, because it changes which pressure-lowering medicines they choose. If you already use glaucoma drops, never stop or change them on your own; the eye doctor decides. For a child with a painful red eye, the same same-day rule applies, and a newborn with red, sticky eyes in the first month needs a doctor the same day too.
What happens at the eye hospital
The doctor measures the pressure with a gentle instrument that touches the numbed eye, looks at the angle with a special lens, and checks the optic nerve. In an attack, they bring the pressure down quickly with drops, medicines by mouth or a drip, and then make a tiny laser opening in the iris so fluid can bypass the blocked drain. The other eye usually gets the same laser too, because it often has the same narrow angle. Most go home the same day or the next, often with a follow-up visit a week or two later to check that the laser opening is working and the pressure has stayed down in both eyes.
If you’re long-sighted and over 40
Ask at your next eye test whether your angles are narrow. It’s a two-minute check. It can save an eye. Browse the Eye Care section for the eye test schedule by age.
Painful red eye and headache: common questions
How do I know if my red eye is serious?
Serious red eyes hurt deep inside, blur your vision, make light painful, or come with headache and vomiting. Gritty, itchy, sticky eyes with clear vision are usually pink eye or dryness. When in doubt, get seen the same day.
Can glaucoma cause a headache and vomiting?
Yes, an acute angle-closure attack often does. The headache usually sits over the same eye or forehead, and nausea or vomiting follows as the pressure climbs. Many attacks are mistaken for migraine or a stomach upset.
What are the first signs of a glaucoma attack?
Early signs are misty vision, rainbow halos around lights, and an ache in or around one eye, often in the evening or in dim light. Some people have brief episodes that pass after sleep. Those warning episodes need an eye check within days.
Can pink eye cause a headache?
Mild pink eye can make you tired and irritable, and a cold that comes with it can bring a headache. But deep eye pain with headache and blurred vision isn’t typical of pink eye and needs a same-day check.
Is it safe to put rose water in a red eye?
It isn’t sterile, and it can sting a damaged surface or carry germs. For simple pink eye, cool boiled water on clean cotton to wipe discharge is enough. For a painful red eye, put nothing in and see a doctor.
Can I use my old eye drops for a red eye?
Don’t. Leftover drops may be contaminated once a bottle has been open for a month, and steroid drops in particular can make ulcers and infections much worse while hiding how bad things are getting. A doctor should see a painful red eye before any drop goes in.
Can a glaucoma attack happen in both eyes?
Usually one first. That’s why doctors usually give the second eye a preventive laser too.
Can a child get a glaucoma attack?
It’s rare in children. A child with a painful red eye is more likely to have an injury, a foreign body, iritis or an infection, all of which still need a doctor the same day.
Red eye while wearing contact lenses: what should I do?
Take the lenses out, don’t put them back, and see an eye doctor the same day if it hurts or vision blurs. Bring the lenses and the case, because they help identify the germ.
Can cold medicine trigger glaucoma?
Some cold, allergy and travel sickness medicines can trigger an attack in people with narrow angles. If you’ve been told your angles are narrow, ask the pharmacist before buying any, and show the eye doctor your medicine list.
Is vision lost in a glaucoma attack permanent?
Some can be. The faster pressure comes down, the more sight is saved, which is why hours matter.