What is the reason why red lumps itch on the back

Under normal circumstances, red lumps on the back are mostly caused by allergies, and may also be caused by excessive sweating after exercise. Normally, it is recommended to go to the hospital for examination. At ordinary times, it is also necessary to pay attention to maintaining personal hygiene, prevent staying up late, and pay attention to frequent bathing. Moreover, it is necessary to pay attention to not scratching with hands.