My arms have many blemishes, so I can't show them even in summer. Is treatment not possible?

Can I undergo a treatment for arm spots that appeared during the hot summer days?

I worked in the fields all day on a hot summer day ten years ago.

I was able to work without worries because I was wearing long-sleeved clothes, but then I noticed a large blemish had appeared.

Since then, it's been difficult to wear clothes with my arms exposed even during summer.

I'm so upset.

Is it possible to perform this procedure?

I've been to a few dermatology clinics, but they don't seem to take much interest.