No erythema effect or Previous light erythema effect disappeared | Every time increase 20~ 25% dose. |
Mild erythema effect | Same as the last dose or increase 10% dose,if erythema effect disappears,same as A . |
Asymptomatic, clear the shinning erythema | Stop treatment for one time, then with the same exposure, later every time by 10% gradually increasing dose |
The pain of erythema, or with edema,blister | Stop treatment, until recovery. Reduce the dose half, later every time increased by 10% dose |