Dear Worried Wart
Horny papules are the bane of my existence. The weirdest remedies have worked. Taking your wart to a scary graveyard at midnight (don’t think it works as well at crematorium gardens) or spitting on it every morning. This last one may have some science behind it, due to the enzymes in saliva. The homoeopathic remedy Thuja is a standard for warts. Another possibility is applying the fresh juice of the greater celandine plant (Chelidonium) on to the offending horny papule.
Best of luck.