Please don't apply band aid. Immediately after burn keep the area under cool running water and repeat that often in first few hrs.
Later if it's a small burn apply an antibiotic cream like T-bact ointment or if it's a bigger one please show a doctor.
You may consult online with photos if needed.
Next Steps
Keep area under cool running water for 10 mins. Repeat few times.
Health Tips
Leave the burn open if it's a small one. Apply antibiotic cream and visit a doctor if required.