I have to agree with Hecate....
One of the biggest problems with the Internet is how easy it's made people to mis-diagnose a pulled muscle as something that is normally only contracted by the indiginous people of the Upper Volta.
I know someone who was advised not to even try looking up what they had on the Internet, because there are two types of the condition. One is a benign growth that causes no problems and is easily removed, and the other is invariably fatal within a few years.
And of course, both have the same initial symptoms.