Consult a general surgeon in person, as the condition needs physical examination to further decide treatment.
Nothing to be scared of, there might be infection, fissure, or sinus, and all these require different treatment, which cannot be decided without examining in person.
Next Steps
Consultant asap to prevent aggravation of problem.
Health Tips
For the time being You can take sitz bath with plain water.
How to do it:
Use a clean tub with warm (not hot) water.
Sit so the anal/perianal area is submerged.
10–15 minutes, about 2–3 times/day, especially after passing stool.
Gently pat dry afterward—don’t rub.
Plain warm water is usually enough; Dettol, antiseptic, salt, or soap isn't routinely needed and can irritate the area.
Won't recommend using any local application of ointment without diagnosis.