What if a person has chronic difficulty sleeping what disorder involving gland?

Hypothyroidism: If a person has chronic difficulty sleeping, it is possible that they may have a thyroid disorder, specifically hypothyroidism.

Hypothyroidism, or underactive thyroid gland, can lead to a variety of symptoms, including sleep disturbances such as insomnia or excessive daytime sleepiness (hypersomnia). When the thyroid gland doesn't produce enough thyroid hormones, it can affect the body's metabolism and disrupt the body's natural sleep-wake cycle. Additionally, hypothyroidism may cause other symptoms like fatigue, weight gain, cold intolerance, constipation, and dry skin.