What Causes Excessive Sweating?

Thyroid Issues

This is another potential cause of excess sweat among pregnant women: pregnancy kicks the thyroids of some women into overactivity, which is associated with high sweat levels. It can do the same to the non-pregnant too, though. Hyperthyroidism — the medical term for an overactive thyroid — means that the thyroid gland, which plays a large role in manipulating your body's metabolic rate, goes into overdrive, producing excess levels of the metabolic hormones thyroxine (T4) and tri-iodothyronine (T3). Your body's reaction to these hormone levels will be to speed up in basically all senses of the word: all your systems will be driven to work incredibly hard.