This is a Peri-anal abscess ...
It needs antibiotic treatment and if small enough that may be enough...
Your doctor may need to make an incision and release pus as possible
Sitz baths with Epsom salts may be helpful for you ...
Topical antibacterial soap ( Hibiclens from pharmacy ) then apply Neosporin ointment would certainly not hurt and may be helpful
An oral antibiotic should be part of your treatment though
I hope that this information is helpful for you
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Thank you and Best Regards,
Anthony Bray MD