Winter-Weight-Gain-How-to-Nip-This-Problem-in-the-Bud-Right-Now-MainPhotoHere’s something else to consider: extreme sweating not only is ineffective but dangerous to your health as well. Depleting your body’s precious water reserves this way can cause dehydration, loss of vital minerals and electrolytes, cause severe kidney damage and cardiovascular problems, among other health problems. According to WebMD, “excessive sweating, or hyperhidrosis, can be a warning sign of thyroid problems, diabetes or infection. Excessive sweating is also more common in people who are overweight or out of shape.