What Causes Excessive Feet Sweating?

Excessive sweating may be due to any of the following: Environmental factors, such as an overly warm or humid environment. It doesn’t matter what time of year it is; if you are in a very hot or moist room, your feet will sweat more than normal.

It doesn’t matter what time of year it is; if you are in a very hot or moist room, your feet will sweat more than normal. Respiratory conditions that leave the skin dry and irritated. For instance, people with asthma may have excessive foot sweating because they can’t control their breathing patterns during times when their symptoms flare up and cause them to pant heavily from exertion—and because those same symptoms can lead them to develop restless legs syndrome (RLS). Those who take corticosteroid inhalers for asthma may also experience RLS because those medications reduce moisture on their lungs and increase respiratory resistance so that they have trouble controlling their breathing during times when receptors send out signals telling them to breathe.[ 4 ] Other medical conditions known for causing excessive foot perspiration include diabetes mellitus,[ 5 ] hyperthyroidism[ 6 ], Parkinson disease[ 7 ] and central nervous system tumors.[ 8 ] A number of prescription drugs may also cause increased perspiration on the feet:[ 9-12 ][ 13-15 ]. These include antibiotics,[ 16-18 ][ 19 ], antipsychotics[ 20 ][ 21 ], antidepressants[ 22 ], antidiabetic agents[ 23 , 24 ]

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