The phrase "change in one's sleep patterns" refers to any alteration or variation in an individual's normal sleep habits, routines, and cycles. This can include changes such as difficulty falling asleep, waking up frequently throughout the night, experiencing restlessness while sleeping, or feeling excessively tired upon waking up. These shifts in one's sleep patterns may be caused by various factors including stress, anxiety, medical conditions, lifestyle choices, and environmental influences. It is important for individuals to recognize any changes in their sleep patterns as it can have a significant impact on their overall health, well-being, and daily functioning.