Fever can cause eye pain. Eye pain may be caused by conjunctivitis of the eye due to cold. It is important to pay attention to eye hygiene and drink plenty of plain water. When the human body has a fever, most of the heat enters the eyes, and the eyes will feel painful and blurry. After fever, the blood vessels of the whole body are stretched, hot, and heartbeat is accelerated, and the blood vessels of the head are also dilated and blood circulation is increased. Neurogenic headache is the most common manifestation, there will be corresponding headache and dizziness, and the eyes will also feel swollen, along with a throbbing sensation, and the increased intracranial pressure will also cause eye pain. You can take more rest, relax the eyes, apply local heat and massage the temples to achieve the effect of pain relief.