I had 2 warts removed from my head, a larger one behind the hairline which took 2 x 30 second cryotherapy treatments (same appointment). It stings a bit but not painful and over before you know it. It blistered but after 2 weeks was completely gone. A second, smaller wart was at the top of my forehead, which John suggested I leave as it would blister and be more visible, which I thought was very considerate. I asked him to do it anyway and after a week it was gone.
Excellent service.