They can go away on their own but there is no guarantee of how long this may take. If you have a persistent verruca on heel then speak to your podiatrist to discuss treatment options.
They are caused by a virus that enters the skin on the bottom of the foot. These are also known as plantar warts.
If left untreated verruca can go on their own but can alternatively get bigger or spread. Sadly they are unpredictable. If you notice it getting larger or spreading then contact your podiatrist to discuss treatment options.
The majority of verruca go within two years but they can stay for multiple years. People who are immunosuppressed will find it extremely difficult to remove them.
Unfortunately there is no fastest way and no treatments are effective in all people. It is a good idea to monitor and at least prevent them from spreading. Treatments range from salicylic acid, cryotherapy, dry needling, electrosurgery and surgical excision.
There is no verruca treatment that will definitely be effective for every person. Your podiatrist may suggest starting with cryotherapy before moving over to alternative treatments, such as excision, dry needling of electrosurgery.