Waking at night can have more than one cause. Sleep may change with age, but pain, medical conditions, medicines, sleep apnoea and other factors can also interrupt rest. One evening habit should not be assumed to explain every case, and there is no guaranteed fix within eight days.
Keep a sleep diary for about two weeks
The National Institute on Aging suggests recording when you go to bed, when you think you fall asleep, night waking, when you get up and any naps. Also note caffeine, alcohol, exercise, medicines and symptoms such as pain or nighttime urination. Look for recurring patterns to discuss with a clinician; a diary is not a diagnostic tool.
Change only low-risk habits one at a time. Do not stop prescribed medicine, add sleep medicine or sharply restrict time in bed without medical advice, especially if you have another condition or a risk of falling. Talk with a clinician if poor sleep continues, affects daily activities, or comes with loud snoring or waking while gasping. This is general information, not a diagnosis or treatment plan.
Sources
Source video: Watch on YouTube