@katcollins
I used to have spots on my arms and in the summer they got much worse, painful itching, big Blistery type of spots. Went to many doctors. No one could figure it out. I was told I was not getting enough sun, and I needed to spend more time in the sun. The sun has made it worse. The only time I had any relief was in the middle of winter. Spring came everything that subsided came back worse than ever.
Long story short, I got a second opinion and Clinic that deals with allergies only in Wisconsin
The first time I saw the doctor, he looked at my spots and he said you have an allergy to the sun
Cover up your arms, wear a big hat to cover your face. Immediately, I started feeling relief and for many years, I had to wear something on my arms and face outside.
I now can be outside limitedly without problems, but somewhat it hurts
I was told what is in the sun changes like the weather changes
Good luck