I noticed I was getting these marks on my left leg and foot that appeared to look like bites and they’d itch like hell and then it I got some marks on my right calf that itches and it swells up. I have some on my arms and one on my face. Now I’m getting them on my back and they’re pretty big, red and itchy and they look to appear in twos. I thought It was bed bugs or a spider keeps biting me at night but I seen my doctor and he doesn’t know. He said the ones on my arms look like bites but the ones on my back throw it off and he thinks it’s an allergic reaction to something. Anyone know what this is?