How can sun exposure help eczema?

[@signedupfordoconly4275]

Pretty fascinating. I’ve been suffering for 2 years with lesions that magically appeared on my hips in my middle age. I’ve never dealt with this before. Wouldn’t you know I’ve been getting the LEAST amount of sunlight I’ve ever gotten in my life the last few years. Grew up on beaches and all my adult life worked a fair bit outside. Now in my 40’s I’m indoors 23+ hours a day and wham here’s the eczema.

[@ls1959]

If this premise is true, it might explain why phototherapy (light) using narrowband UVB radiation is effective in treating eczema.