Hello, Night sweats can be normal for some people, it can be due to a disorder known as Idiopathic Hyperhidrosis, which means people with excessive sweating with no known cause. However excessive night sweats could also be a sign of underlying disease, this type of excessive sweating is known as secondary hyperhidrosis. The underlying cause could be many different things and can t be diagnosed with the information you gave above. A full detailed history, and a thorough medical examination required. Therefore I suggest that you visit the doctor as soon as you can to rule out any underlying cause of your sweating. Tell him if there are any medications you are taking (some medications could cause this). The Doctor will take a full detailed history of you, for example, if you had recurring infections, if you have weight loss recently, signs of unknown fever if you have the inflammatory disease if you have family members with the same condition etcetera. The doctor will also run some tests to see what s the underlying disease if there is any. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Parin N. Parmar