It would be a sign that the numbers are up again, and being on that part of the body they probably migrate from the colon.
Have you changed your diet in any way recently?
This will make you feel at least 90% better: coconut oil.
Many just take it orally, but if you take a half a teaspoon, put it onto your fingers and rub it into the area, it will kill the yeast on the skin and alleviate the itch, almost instantly. Expect it to work within a couple hours.
Do this once a day for a few days, then whenever it gets worse as you feel it.
It will not prevent it in the future, it’s like applying sunscreen – only temporary. You need to reduce the numbers in your intestinal tract to prevent it coming back.