The macerator is a metal plate used to kill bacteria on the skin surface.
The device is usually used to treat acne and burns, but some people have tried to apply it to the scalp to stop it growing.
The skin is then washed away with soap and water, which is then left to dry.
The process causes the skin to shrink and the hair follicles to grow.
What’s the downside?
Some people have reported pain, itching and burning when applying the maceratoprost.
There have been cases of skin cancer, though these are rare.
More common are skin infections and eczema.
Are there treatments?
No treatments have been developed yet.
If you or anyone you know needs help, call the National Dermatology Service (NDS) on 0800 522 709 or email them for more information.