ANSWER:

No, this is not cautery but it was sinful for hurting them like this. 

QUESTION: At school, I used a metallic ruler and rub it against the table very fast and then press it against my friends to give them a burning sensation on their skin. These burns would sometimes leave marks on their skin as well. I have changed since then and I learnt about 70000 who enter Jannat without accountability, was what I did cautery and have I ruined my chance of being among the 70000?

Character and Morals, Halal/Haram Matters, Sins |