How long does it take?
Up to 12 weeks of daily treatment. Most people stop at three or four weeks and conclude it failed. It did not — it was not finished.
Do I really have to file it?
Yes. Filing removes the dead layer so the acid reaches living wart tissue. Skipping it is why treatment stalls.
Will it come back?
Sometimes. Warts are cleared by your immune system recognising the virus, and that can take time. Recurrence is not treatment failure.
Can I use it on a verruca if I am diabetic?
Not without advice. Reduced sensation and slower healing mean a chemical burn on the foot can turn into a serious ulcer. This is the one situation where self-treating is genuinely unwise.
Is freezing better?
No — the evidence does not favour it. Cryotherapy is more painful and more expensive, with comparable results. Using both together may do slightly better than either alone.
Do I need to treat it at all?
Not necessarily. Most warts clear on their own within two years. Treat if it hurts, is spreading, or bothers you — not because it must be removed.
Can I use it on my face?
No. Never on the face or genitals. Those need assessing and treating differently.