Most people carry Demodex in their skin but it is not considered the cause of acne. Hulda Clark found the roundworm Trichinella in all of the Acne cases she saw and wrote that it was involved in Acne along with some bacteria and hormone imbalances. She advised using a Zapper or frequency generator set at404.5 KHz extending 5 KHz on each side to be sure to include (killing) all eggs and other molt stages. She found that this treatment cleared up Acne in 10 days.