I am a 22 year old female and for about a year now I have been getting welts on various parts of me body such as my chest and back then also knots in my feet and swelling in my hands and toes. These sympthoms will come and go but they itch most ties and the ones on my hands and feet burn and sting what is this? Please help.

You need to see a doctor about this. There is no way we can diagnose it over the internet.