Health experts have urged people not to ignore a 'red flag' hay fever symptom which can often be mistaken for something else. It comes as the Met Office has forecasts high pollen counts over the coming days weeks, and the NHS has seen a surge in searches for hay fever.
The Met Office is also warning sufferers to prepare for weeks of hay fever, as they move into "grass season". Hay fever sufferers will commonly experience sore eyes, an itchy throat and a snotty nose rather than an idyllic summer outside soaking up the sun's rays.
However, aside from the more obvious symptoms - some sufferers could also experience a headache, which could be ignored or confused with something else. A sinus headache can be caused by a build-up of pressure which results in a sinus headache. This tends to feel as if there is "intense pressure inside the head or behind the eyes".
