Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
Cauterizing with fire in a dream indicates bad speech or unlawful money. If the cauterizing is for illness, it is righteousness in religion. Cauterizing on the forehead indicates withholding Zakat.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
Cauterizing indicates strife. Whoever sees himself cauterize a person is tempting him in his religion.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
Cauterizing is interpreted as worry and grief. Whoever sees himself cauterize himself will be afflicted with worry.