Salim (may Allah have mercy on him) narrates that Sayyiduna Ibn Umar (may Allah be pleased with him) had himself cauterized for facial palsy (laqwah), and he cauterized his son Waqid.
(b) Nafi' (may Allah have mercy on him) narrates from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that he had himself cauterized for facial palsy and had ruqyah done for a scorpion sting.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19556