Understanding Insomnia: When Sleep Becomes a Struggle When Slumber Aches
Insomnia is/ can be/has become a common sleep disorder that/where/which affects millions/countless/a vast number of people worldwide/globally/across the globe. It is characterized by/defined as/often involves difficulty/problems with/struggles to falling asleep/staying asleep/getting back to sleep after waking/once you're awake/throughout the night