A Violet Ray machine is by far the most superior machine except for a Molecular Enhancer for fungal nail and feet problems. I've had experience in this department and this is a sure thing. My mother whos suffered with bad fungal feet and hard skin since her cancer DEATH treatments just did not get any difference even with Terminator or Silverado De-luxe. Her Thyroid is shot and thats one of the reasons. Theres obviously a lack of blood flow in that area because after using the Violet Ray the differences was startling and SUPER QUICK! So therefore I guess it depends on the problems you have internally as to wether it will happen or how long. I suggest you look into Violet Ray machines as these are awesome tools and portable as a bonus.