Sounds like you have a fissure, but might be an abscess as your doctor said a cyst. Unless the fissure is infected. Difficult to tell from what you've written. Did the doctor give you anything to take? Do ask what
exactly it is. Don't worry about your typing, by the way.
Here are some standard ways that many deal with fissures that seem to help:
1. Fissure cream -- Nifedipine or Diltiazem or Nitroglycerin...get one of these creams and start applying 3x per day
2. Eat properly / Drink properly -- this means eating a good amount of soluble and insoluble fibre in your diet. Try cutting out the junk and the white flour, cut out processed foods -- add veggies, fruits, grains. I also found adding oils to my diet helpful. Make sure you keep well hydrated -- 8 glasses of water or herbal teas a day. Water is your friend.
3. Clean the area - after BM make sure you are clean. Use a sitz bath -- great way to stay clean. Don't use harsh loo paper. Dab! Rinse!
4. Heat -- to help promote blood flow and healing sit on a heating pad throughout the day...take warm baths, use a sitz bath.
5. Lubricate -- you can use a lubricant in the area before a bm...use vaseline, or coconut oil.
I hope some of this helps -- also, find a good colon and rectal surgeon (CRS) who knows about fissures and they will know all about the creams I mentioned.
If your stool does not soften up from a better diet I would personally look at taking Miralax (may have a different name where you are) for a few weeks...dont necessarily take a full dose...experiment with the least you can take to make things soft. Keeping it soft is key to healing.