Hormonal Changes: Night sweats in young women are often associated with hormonal fluctuations, particularly during the premenstrual phase of the menstrual cycle or due to birth control methods. These hormonal changes can lead to vasomotor symptoms, including night sweats.

Anxiety and Stress: Psychological stress and anxiety can cause hyperarousal, leading to increased body temperature and sweating at night.
Sleep Disorders: Sleep disorders such as sleep apnea, insomnia, or restless leg syndrome can disrupt normal sleep patterns, leading to increased body temperature and sweating.
Medications: Certain medications, including antidepressants, blood pressure medications, and hormone replacement therapy, can cause night sweats as a side effect.
Infections: Common infections such as tuberculosis, endocarditis, or osteomyelitis can cause night sweats, although they are less common in young women without underlying risk factors.

Lymphoma: Although rare, lymphoma can present with night sweats, fever, and weight loss. It is crucial to consider this diagnosis to avoid delayed treatment.
Tuberculosis: TB is a serious infection that can cause night sweats, and it is essential to rule out this diagnosis, especially in individuals with risk factors such as immunocompromised status or recent travel to endemic areas.
Hyperthyroidism: An overactive thyroid gland can cause increased metabolism, leading to night sweats, weight loss, and other symptoms.

Pheochromocytoma: A rare tumor of the adrenal gland that can cause excessive catecholamine production, leading to night sweats, hypertension, and other symptoms.
Neurological Disorders: Certain neurological disorders, such as autonomic dysfunction or multiple system atrophy, can cause abnormal sweating patterns, including night sweats.
Hypoglycemia: Recurrent episodes of hypoglycemia, especially at night, can cause sweating, including night sweats, in individuals with diabetes or other conditions affecting glucose regulation.