Tuberculosis (TB): Night sweats are a classic symptom of TB, especially in its active form. The body's immune response to the infection can cause an increase in body temperature, leading to sweating at night.

Hormonal Changes: Night sweats can be associated with hormonal fluctuations, particularly during menopause or andropause. Decreases in estrogen or testosterone levels can lead to hot flashes and night sweats.
Anxiety and Stress: Anxiety disorders, including generalized anxiety and panic disorder, can cause night sweats due to the body's stress response.
Hypoglycemia: Low blood sugar levels, especially during sleep, can trigger the release of stress hormones, leading to sweating.
Medications: Certain medications, such as antidepressants, hormone replacement therapies, and steroids, can cause night sweats as a side effect.

Lymphoma: Night sweats can be a symptom of lymphoma, particularly Hodgkin's lymphoma. It's essential to consider this diagnosis to avoid missing a potentially life-threatening condition.
Infections: Besides TB, other infections like endocarditis, osteomyelitis, or abscesses can cause night sweats.
Hyperthyroidism: An overactive thyroid gland can lead to increased metabolism, heat production, and sweating.

Pheochromocytoma: A rare tumor of the adrenal gland that can cause excessive production of catecholamines, leading to night sweats, among other symptoms.
Neurological Disorders: Certain conditions like autonomic dysfunction or multiple system atrophy can affect the body's temperature regulation, resulting in night sweats.
Sleep Disorders: Sleep apnea, insomnia, or restless leg syndrome can contribute to night sweats, although they are less common causes.