Just a few Anxiety  •Autonomic neuropathy (damage to your autonomic nerves) •Brucellosis (a bacterial infection) •Carcinoid syndrome (a syndrome resulting from a certain type of cancerous tumor) •Endocarditis (an infection of your heart lining) •HIV/AIDS  •Hodgkin's lymphoma (Hodgkin's disease) •Hyperthyroidism (overactive thyroid) •Leukemia  •Menopause  •Myelofibrosis (a bone marrow disorder) •Non-Hodgkin's lymphoma  •Osteomyelitis (a bone infection) •Pheochromocytoma (a rare adrenal gland tumor) •Pyogenic abscess (a pus-filled cavity caused by an infection) •Sleep disorders (such as obstructive sleep apnea) •Stroke  •Syringomyelia (a fluid-filled cyst in the spinal cord) •Tuberculosis  http://www.mayoclinic.org/symptoms/night-sweats/basics/causes/sym-20050768