Brief Answer:
This can be a serious problem.

Detailed Answer:
Hi.
Thanks for your query, albeit small.

I would like to know a few details if you can please give ::
Since when have you got this (how many days)?
Is there any discharge of blood and / or pus ?
Is it at the anal verge or away from the anus ?

Your query: is it serious ?
Once we know the diagnosis, we can say whether this is serious or not.
The probable cause of such a boil can be one of the following:
-Simple boil.
-Ischio-rectal fossa abscess- a space near anal canal.
-fistula -in -ano.
This can be ascertained only by a General Surgeon, so consult one if you can for actual physical examination and to get a proper dose of an antibiotic and anti-inflammatory medicines like Ibuprofen ( if it suits you).

Your another query- Home remedies ?::
Sitz bath- sit in a tub with warm water, this gives hot fomentation and local soothing.
Apply liquid povidone iodine locally to make are sterile.
Laxatives at bedtime to have a soft motion in the morning.

Rest of the treatment needs an actual examination and a prescription based medicines..

I hope this answers your query, please feel to ask for more if you think I have missed some points.

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Brief Answer:
Which City do you reside in ?

Detailed Answer:
Thanks for your appreciation.
You may please get the address from my public profile:
http://doctor.healthcaremagic.com/doctors/dr-t-chandrakant/67188

Where are you residing at?
I am in XXXXXXX

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