This can also mean you are at greater risk for some of the dangerous complications of high blood pressure.
One scientific study, published in Hypertension journal in 2013, found that among 2,900 participants with high blood pressure, those with a mild form of hypertensive retinopathy had a 35 percent greater risk of stroke.
And those with moderate or severe hypertensive retinopathy had a 137 percent higher risk.
Another expert, pharmacy superintendent at Superdrug – Niamh McMillan – shared what else to look out for.
“Subconjunctival haemorrhage is different to bloodshot eyes and is a small bleed (similar to a bruise) from one of the minor blood vessels on the surface of the eye,” she said.
“This can look like a bright red patch on the white of the eye and it would prompt a blood pressure reading as it can be related to hypertension.”
Healthy blood pressure is considered to be between 90/60 millimetres of mercury (mmHg) and 120/80mmHg, whereas high blood pressure is considered to be 140/90mmHg or higher.
Other causes of bloodshot eyes
Dr Bizrah added: “Looking in the mirror and noticing your eyes are pink, bloodshot and watering can be alarming.
“And while these symptoms can have a variety of different causes, the good news is that many can be treated at home.
“The most common cause of pink eye is when the eyes become dry or irritated and this can then lead to your eyes becoming leaky, with increased tear production.
“Allergic conjunctivitis is particularly common among hay fever sufferers during the peak pollen season in spring and summer. It can also occur in response to certain triggers, such as a dusty environment or pet fur.
“Over-the-counter antihistamine eye drops are available to treat this form of pink eye, and we often find them to work better than antihistamine tablets.”
If you think you have high blood pressure you should speak to your GP.
