A few days ago I began developing some red spots on my foot that were itchy. I thought it was a bug bites, but they've only increased and is only on one foot (although other spots on my body have been itching from time to time, without a rash). What do you think it is?

Possible causes:
- Just started drinking bone broth
- Began eating kimchi on a daily basis; now it's been 2 weeks
- Weather is turning cold/different atmosphere (it rained just yesterday)
- Developing a nut allergy

I want to say it's the first reason due to bad bacteria die-off, but I eat between 50g-200g carbs/day, so shouldn't those carbs be feeding the bad bacteria? Just wanted to know what you guys thought. Thanks in advance!