Itchy Spot On Arm, Leg, Stomach, Opens And Oozes Clear Serum, Then Scabbed. Suffer High Yeast System, Nail Fungus. Any Relation ?

Last September and now again in July I woke up in the morning with no sores or spots but I would have an incredibly itchy spot on arm, leg, foot, stomach or wherever. I would scratch it and get a red welt and then a blister on top which would when open ooze clear serum and then become a scab. The scabs continue to itch until they go away. It lasts up to about 6 weeks. I am wondering if it is yeast? I do have a geneticly high yeast system from my mother's side and have nail fungus. I do not however have vaginal yeast infections but have chronic UTI's and take a prophylactic q 2 nights. (50 mg Nitrofurantoin). Could these sores have to do with the yeast?