here is an article from fosters smith about tick removal which also
explains the welting caused by tick bites
http://www.drsfostersmith.com/pic/article.cfm?dept_id=&aid=62&ref=4608&subref=AA&cmpid=E-_-D-_-71508-_-P2
follow these simple steps.
To remove an attached tick, use a pair of fine-tipped tweezers or
special tick removal instruments. These special devices allow one to
remove the tick without squeezing the tick body. This is important as
you do not want to crush the tick and force harmful bacteria to leave
the tick and enter your pet's bloodstream.
Grab the tick by the head or mouth parts right where they enter the
skin. Do not grasp the tick by the body.
Without jerking, pull firmly and steadily directly outward. Do not
twist the tick as you are pulling.
Using methods such as applying petroleum jelly, a hot match, or
alcohol will NOT cause the tick to 'back out.' In fact, these
irritants may cause the tick to deposit more disease-carrying saliva
in the wound.
After removing the tick, place it in a jar of alcohol to kill it.
Ticks are NOT killed by flushing them down the toilet.
Clean the bite wound with a disinfectant. If you want to, apply a
small amount of a triple antibiotic ointment.
Wash your hands thoroughly.
Please do not use your fingers to remove or dispose of the tick. We do
not want you in contact with a potentially disease-carrying tick. Do
NOT squash the tick with your fingers. The contents of the tick can
transmit disease.
Once an embedded tick is manually removed, it is not uncommon for a
welt and skin reaction to occur. A little hydrocortisone spray will
help alleviate the irritation, but it may take a week or more for
healing to take place. In some cases, the tick bite may permanently
scar leaving a hairless area. This skin irritation is due to a
reaction to tick saliva. Do not be worried about the tick head staying
in; it rarely happens