During the summer we sweat more due to high temperatures, to decrease body heat through perspiration. The problem occurs when the sweating becomes excessive and not according to the temperature. It is what is known as hyperhidrosis.
This disorder usually begins in early childhood and is usually diagnosed in adolescence, persisting throughout life if left untreated.
Its exact cause is unknown, but it has been shown that in patients who suffer from it there is an excess in the system signal that regulates sweating (autonomic sympathetic nervous system), as well as a greater sensitivity of the sweat glands to said stimulus.