I have found that spicy food, affects me quite a bit.

If I have any peppers in seasonings (Nightshade veggies) there can be payback the next day in the nether regions.

Some spices come out in the urine, too, which complicates things.

I think this is probably more common in older women who are past the menopause, as tissues thin a bit with the loss of estrogen.

Also a low grade yeast thing may inflame you a bit. There is a one day OTC treatment for vaginal yeast, you might try.

If you are past menopause, be careful with any soap and cleaning "down there". I use baby shampoo and in very small amounts. Soap that is not 100% rinsed off can be very irritating!

I have noticed that any odd pain, does seem to inflame my feet.
I bumped my hand a few days ago and scraped off some skin. It didn't look like much but it really started to burn and itch (no readness), and I was uncomfortable all over during that, for some odd reason. Now it is healed over finally, and it still starts to itch now and then. And I don't dare scratch the new skin etc.
It was about 1/2 the area of a dime!