Hi,
There is a Siddha Medicine preparation called “KALANI KALIMBU” apply 1 tiny drop on it twice a day for few weeks. There will be burning sensation and it will turn in to black. Later it will fall off completely and making a pit like wound.
Next Steps
Then onwards You may apply general wound healing medicines. It will not form again.
Health Tips
Avoid touching with hand or spilling anywhere else, as it may cause burning.