Greetings Madam.
First of all just be relax. It's a common problem.
It's appreciable that you have found out the swelling at an earlier stage, maintaining good eating habits, pass motion everyday, no bleeding during defecation, maintaining height for your weight & even good to hear that there isn't any other systemic problems. Great going!!
But since the swelling is getting bigger and giving you discomfort viz., pricking/pain sensation, some serious thing happening inside.
Just answer following questions:
1. Have you got any fever?
2. Has the swelling ruptured and reappeared or just increasing in size?
& understand that i can't ask more here.
It's advisable to go to a doctor and get examined, in order to find out the exact nature of your problem(or any other problem causing you trouble in that area mentioned) & get treated accordingly before it gets complicated .
Here you can get only guidance.
No doctor will be able to treat unless they see a patient.
And coming for home remedy as temporary measure, follow these simple steps:
1. Take
cold Shower instead of hot bath.
2. Eat green vegetables viz., salads; oat meal
3. Drink plenty of water viz., minimal 8 glasses/day.
4. Maintain proper Hygiene of genital area viz., Clean the affected area with soap and water.
5. Then if pain in anus, take a SITZ bath(a warm, shallow bath with salt added that cleanses the space between the
rectum and genital region) can be used for everyday personal hygiene & also it provide relief from pain or itching in the genital area.You can give a sitz bath in your bathtub.
&
Finally,
Approximately 30-50% of people with an anal abscess(an infection happening inside your existing swelling which rupture) will develop an anal fistula(an abnormal or surgically made passage between a hollow or tubular organ and the body surface, or between two hollow or tubular organs).
Around 80% of all anal fistulas develop from an infection already in the anus.
Consult your Doctor if you feel uncomfortable in spite of above measure.
Hope it helped you.