Reason behind the gum boil needs to be diagnosed as soon as possible, anyway if the gum boil is painful then an anesthetic content in the ointment is a must as it will relieve the pain.
Gels that i would recommend - Warm saline gargles
Betadine gargles
Antiseptic gels like- Orajel, hexigel
Anesthetic + Antiseptic gels like- Rexidine M forte gel
Anesthetic gel- Lox 2% gel
Next Steps
If the ulcers are recurrent then you should consult a dentist/ENT/Gastroenterologist
Health Tips
Low water intake, Vit C and
B12 deficiency, Chronic Acidity, Chronic Smoking and Sharp Tooth are few of the concerning factors