You can also get it from using too high an absorbancy as well. That's what happened to me. (super absorbancy is still made though. In fact I'm looking at a box of em) just change often and don't use anything higher than what you need to ad you should be fine.
You can get Toxic shock syndrome if you leave a tampon in for too long , it is caused by bacteria that gets into the blood stream and can be very dangerous.
Best wishes
Angie
By leaving it in too long. Bacteria then have a chance to grow and it's the bacteria that cause TSS. If you change tampons at least two or three times a day you should be OK. The problem first occurred with super-absorbent tampons that some women left in for days at a time. Those tampons are no longer made. It seemed like a good idea at the time but had unintended consequences.