The present invention provides a photo-therapy device and its use for treatment of skin conditions such as rashes or similar dermatological conditions that are exhibited by Grover's disease or other diseases which are associated or co-existent with Grover's disease. The treatment includes exposure of the subject's affected skin and preferably the entire body with blue LED light to improve skin status by stimulating body's immune system to reduce itching, blotchiness and skin discomfort.
