[user104658]

Both my kids had it 7 - and - 6 years ago (not at the same time, oldest had it, then youngest had it almost exactly one year later - very odd timing) and yes it can cause sepsis and is quite dangerous without antibiotics, but manageable with antibiotics. It's the "sickest looking" my eldest has ever been, she looked like a little ghost and lost a lot of weight. My youngest took it in her stride and had a bit of a fever for 3/4 days and that was it. Again antibiotics are key it's not one to try to "power through" - meningitis/sepsis is a big risk with scarlett fever.

Originally Posted by Beso

Can ruptured appendix cause sepsis.? And can scarlet fever cause ruptured appendix?

A ruptured appendix is a HUGE sepsis risk and is why a lot of people die from a burst appendix. You don't actually need the appendix. It's all the toxic **** it pours into your torso if it ruptures that'll kill you.

For the second part, seemingly SF can on very rare occasions cause appendicitis (which if bad enough could cause a ruptured appendix) but it's not a common side effect. So "It is possible but not likely" on that one.