Recently, as we are approaching summer, ultraviolet rays have become stronger and many patients are experiencing blisters, blisters and erosions when using topical tincture of bone marrow. In order to prevent this from happening, we should pay attention when using tincture of bone marrow: after wiping tincture of bone marrow, the skin should not be exposed to sunlight (especially strong light) for a long time; if it is irradiated with NB-UVB, the time should be gradually extended from 5 seconds, once every other day, and the irradiation should be stopped even if the white spot is not red at the time, not once the white spot should be red, which is likely to cause blistering. Treatment: In case of blisters, there is no need to be nervous. If the blisters are small and not broken, you can use topical glycolic lotion and take oral anti-allergy medication locally; if the erythema and edema are serious, or even large blisters appear, you can go to the local hospital and disinfect them with alcohol, iodine, etc., and then use a needle to puncture the blisters and let the liquid flow out, but pay attention to the area where the needle enters to smear gentian violet to prevent bacteria from entering here and forming pustules; if the local If the local redness is obvious or vesicles appear, you can use 3% boric acid water cold compress (put 3% boric acid water in the refrigerator), 3-4 times a day, 15 minutes each time (Note: the material used for wet compress can be cloth mask, 6-8 layers of gauze or small towel can be used, these wet compresses need to soak cold 3% boric acid water once every 5 minutes, gently squeeze, do not squeeze too dry, but also can not drip down the water, to half dry). (to semi-dry is good), while taking oral anti-allergy drugs. The redness, blisters and erosions will gradually subside after about a week of treatment.