Please choose the correct ending to complete the given sentence: Health: [header] How to treat insomnia [title] Find the cause or source of your insomnia. [step] Try to find what is preventing you from falling asleep and, if possible, eliminate it. You may need to fix other problems and issues first in order to treat your insomnia.

Ending1: For example : [substeps] If anxiety or depression are keeping you awake at night, find what is making you feel anxious or depressed and try to manage that. This might involve speaking with your doctor and taking medication for anxiety or depression. Ending2: This includes : [substeps] Pain, especially in the area where you have been. Excessive sweating, shortness of breath, pain in the morning and night. Ending3: [substeps] Try to identify what it is that has been keeping you up at night. Usually, it's a more believable problem than something more obvious. Ending4: [substeps] Maybe you have a problem with your body's circadian rhythm--or you've been drinking several hours of alcohol last night. Chances are, there's a reason you are sleeping so late.

Answer format: ending1/ending2/ending3/ending4