Three years ago, a female student surnamed Zhou was rejected by a secondary school because she had a fresh erythema mole on her face when she passed the secondary school entrance examination. Later, the doctor of the skin laser center of our hospital treated her meticulously and removed the bright red stain on her face with a laser. After the “roadblock” was removed, Mr. Zhou restored his self-confidence and began a happy study.
Laser treatment of port wine stain, nevus of Ota and other diseases is a new method in the early 1990s. Compared with the previous nuclide, freezing, surgery and other methods, it can achieve a magical effect without leaving any traces after treatment.
Short pulse laser is mainly used in laser therapy. This short pulse laser can ensure the selective destruction of the diseased tissues, and almost no damage to the surrounding tissues. It can also minimize the side effects of the treatment.
At present, there are three main categories of skin diseases that can be treated with laser: ① pigmented skin diseases, such as nevus of Ota, freckle, hairy nevus, freckle like nevus, etc. The target tissue of laser is melanin in melanocytes. Melanin absorbs laser and destroys melanocytes to achieve the purpose of treatment. ② Capillary skin diseases, such as nevus erythematosus and telangiectasia, the target tissue of laser is hemoglobin. Hemoglobin can damage blood vessels after absorbing laser. Pulsed dye laser has a good therapeutic effect on these diseases. ③ Superficial benign tumors, such as syringoma, hair epithelioma, etc. The moisture content of human skin is more than 70%. With water as the “target”, through its gasification and carbonization after absorbing laser, the purpose of removing diseased tissues can be achieved. Pulsed carbon dioxide laser and erbium laser are commonly used.
However, laser is not omnipotent, and some problems should be paid attention to during treatment.
First of all, laser can not cure all diseases, and has no effect on allergic skin diseases. Secondly, laser treatment for pigmented or vascular skin diseases is more frequent, usually about five times, and sometimes more. Laser treatment often takes several months to see the curative effect, and sometimes it takes two or three times to see the obvious curative effect. Therefore, the treatment cycle is relatively long, and it takes twoorthree years to completely cure. Third, laser treatment can cause temporary skin pigment abnormalities, which may be pigmentation or hypopigmentation. The duration varies, and it takes several months or even more than a year to subside. In addition, although most modern laser treatments do not leave scars, scars may still be left if the lesion is deep or the local care is improper.