Vertigo means that the patient feels dizzy, accompanied by the rotation of the visual objects when looking at something. Occasional vertigo may be related to the following factors: 1. If it occurs during head rotation, it should be considered to be caused by otolithiasis, which is caused by the irritation of the cell membrane of the semicircular canal by dislodged otolith particles, and the duration of the attack usually does not exceed one minute. 2. Consider it to be related to blood pressure, as patients with high blood pressure take antihypertensive drugs irregularly, and their blood pressure fluctuates more, which can lead to occasional vertigo symptoms. This can lead to occasional vertigo. If you take too much antihypertensive medication and your blood pressure drops too much, you will also have episodes of vertigo. 3. Occasional vertigo may be related to low blood sugar, for example, if you have diabetes and take too much glucose-lowering medication, or if you consume too much blood sugar, you may have episodes of vertigo. 4. Occasional vertigo may also be related to visual fatigue, such as staring at electronic products for too long. The vertigo can easily appear in episodes.