Depends on symptoms you were having before and currently
It can be
Chronic pain conditions (arthritis, back pain)
Respiratory disorders like Obstructive Sleep Apnea
Neurological disorders (Parkinson’s, dementia)
Endocrine disorders:
Hyperthyroidism
Diabetes (nocturia, neuropathy)
Gastroesophageal reflux (night symptoms)
Caffeine, nicotine, alcohol
Steroids, antidepressants, stimulants
Long-term sleeping pill misuse → rebound insomnia