What intervention should a nurse suggest to a client to reduce pain at the onset of a migraine headache?

The recommendation to darken the lights is grounded in the understanding that many individuals who experience migraines are particularly sensitive to light, a condition referred to as photophobia. When a migraine begins, reducing exposure to bright lights can help alleviate discomfort and minimize the intensity of the headache. Creating a darker environment can provide relief as it helps to reduce sensory over-stimulation, which is often a trigger or exacerbating factor for migraine sufferers.

In contrast, the other options, while they might offer some relief for certain symptoms or conditions, do not specifically address the immediate pain associated with the onset of a migraine as effectively. For example, while taking over-the-counter pain medication can be beneficial, it is often more effective if taken at the very onset or preemptively rather than as a first resort. Engaging in light exercise could potentially lead to increased pain or discomfort during a migraine episode, as physical activity can trigger or worsen symptoms for some individuals. Drinking plenty of water is essential for general health and hydration but is not typically a direct intervention for migraine pain onset.