Hello, Dr. I have a thin line structure on the left side near my anus. There is a small hard pimple on its ending opposite the anus. It first appeared about 2 months ago. I thought that it would disappear in several days time, but it hasn t gone yet. Sometimes, it gets irritated and I feel a little pain of stinging/burning. I m afraid because I don t know what it could be. Is it a symptom of hemorrhoid appearance, hair follicle or something else? What can be the reason for its appearance? How can it be cured? Looking forward to your answer/advice. Thank you in advance.