Hey,
I am in my late teens. I noticed that I have a small ball growing in
my ball sack. It seems like it is an extra nut, but much smaller. I
would say it was the size of a pebble when it started and now is the
size of a good sized pea. I am going to the doctors on the 20th but I
would like to know a little more about what I am dealing with. I am
not sexually active, or ever been sexually active. It is very hard
when I squeeze it, but it is not painful at all. I am sorry if this
sounds inappropriate, but it is a big concern of mine.
I appreciate all of your help.

-Vormav

Hello vormav:

There are no inappropriate questions. You are obviously very concerned
about what's going on with your health, and I would like to help. I am
glad that you are going to see your doctor next week, because we here
at Google Answers are certainly not doctors and do *not* give
professional medical advice. As well, your doctor can actually examine
you in person and that's the *best * way to start.

Having said that, however, I did some searching for you and I think
what you have is called a "spermatocele", or a testicular cyst. First
thing you need to know about spermatoceles is that they are BENIGN -
which means they are not dangerous (or cancerous) in any way.

Here's some information about spermatocele. Please let me know if this
information (and the other details on these pages) accurately
describes what you feel in your scrotum.

Testicle swelling
URL: http://www.4-men.org/testicle-swelling.html
Quote: "Spermatocele (Testicular Cysts) 
Testicular cysts, also known as spermatocele, are fluid-filled cysts
that develop on the epididymis. Spermatocele contain sperm and usually
appear on the top portion of the epdidymis. A testicular cyst does not
usually cause pain, nor does a cyst typically require treatment.
Surgery or needle aspiration may be employed if the spermatocele is
large enough to affect the appearance of the scrotum."

Subject: spermatocele or cyst on spermatic cord (vas diferens)
URL: http://medhelp.cc/perl6/Urology/archive/4101.html
Quote: "A spermatocele is a cystic structure or outpouching of the
epididymus. The cyst itself is usually firm and nontender. It is
usually filled with sperm and epididymal fluid and considered a benign
lesion. It is possible for it to lead to a decrease in fertility
however this is uncommon. The most important part of diagnosis is to
make sure there is no cancerous lesion. Again this can be done by a
good physical exam or ultrasound."

Some more detailed medical description can be found at:

Spermatocele 
URL: http://www.emedicine.com/med/topic2880.htm

The following page has a great diagram:

Spermatocele 
URL: http://www.nlm.nih.gov/medlineplus/ency/imagepages/19692.htm

Search Strategy 
(on Google):
* scrotum "small pea" hard "not painful"
* spermatocele
* spermatocele hard cyst
(on Google Images)
* spermatocele 
  http://images.google.ca/images?q=spermatocele%20&hl=en&lr=&sa=N&tab=wi

I hope this helps. Please let me know if you require further
clarification before you rate this answer.

websearcher

Hi,

  I am a testicular cancer survivor. My Doctor told me that I am alive
and well (24 years after the fact) because I didn't waste time making
a Doctor's appt. I went to my local hospital and went to the emergency
room and told them that my "Ball hurts". They diagnosed me that day
and operated on me the next day!

  Go now!                  Roy

Great question and a very interesting answer!