as you are suffering from fissure
which most painful disease of GIT caused due to unhealthy habit of modern life. First of all stop that unhealthy habits and start a new journey towards healthy life and consult a good proctologist
he will do local exam and decide what to do about it. Do that treatment and after that you still suffering from that pain
then I would recommend to Consult good homeopathic as in homeopathy this problem get permanent cure without operations and Without any Side effects.