While sleeping, the sweat and water from the head often become stripes on the pillows. If there are already spots on the sides of the pillows, you should not use them anymore My mother has been suffering from suffocation and coughing for about a year Last month, the weather was hot and rainy, so the humidity was high and it was the season for viruses to grow, so my mother’s chest pain didn’t go away and she couldn’t sleep at all every night.