It is due to constipation. U have to include Fibre rich foods in ur diet all 3 times u eat.
u can also take cremaffin syrup 7ml at night for few days.
and also try sitz bath 2 to 3 times a day
Next Steps
can also apply Smuth cream 3hrly once for pain relief
Health Tips
eat Fibre rich foods
plenty of water
avoid junk foods and maida