Filiform warts are caused by papillomavirus infection. This disease is contagious and recurrent. Generally, after laser treatment, there will be small wounds on the treated area. It is important to protect these wounds. Avoid washing with water as much as possible and wait until scabs form before bathing. When bathing, try not to scrub the area with a bath towel. If some warts are not completely removed, scrubbing can cause the virus to spread and lead to recurrent infections. If a recurrence occurs, it is essential to go to the hospital for another laser treatment. Do not wait until the warts have grown significantly before seeking laser treatment. Towels or bath towels that you have used should be sun-dried and disinfected, and used separately from those of other family members to prevent the virus from spreading to them. Regular exercise to boost immunity can also be beneficial in preventing recurrence.