Which of the following is a sign of stress relating to physical health?

Difficulty sleeping is a clear indication of stress relating to physical health. When an individual experiences stress, it can lead to a variety of physical reactions, one of which is trouble falling asleep or staying asleep. This disruption in sleep can further exacerbate physical health issues, leading to fatigue, decreased immune function, and various chronic conditions.

In the context of stress, sleep disturbances are significant because they can directly impact a person's overall well-being and ability to cope with stressors. Sleep is vital for bodily functions, including recovery and restoration processes, so when stress interferes with it, the physical health of the individual can be compromised. Recognizing difficulty sleeping as a sign of stress is essential for early intervention and support in managing both mental and physical health.