Some patients will have different degrees of discomfort, such as slight tingling, etc., during each light spot treatment, the complete lack of sensation may mean that the treatment is ineffective. This tingling and immediate disappearance at the end of treatment may have a slight burning sensation 1 hour after treatment, ice should be applied for 10-20 minutes after treatment, some patients will experience mild erythema and edema after treatment, which will generally subside within 2-5 days Very few patients may experience purpura, blistering and crusting, this condition should be contacted with your primary care physician and her/his treatment recommendations should be followed. Avoid hot water facial washing or other stimulation such as massage and rubbing for 24 hours after treatment, avoid using scrub cleanser, avoid excessive make-up, topical creams with exfoliating effect, cosmetics that make wrinkles, skin grinding, scrubbing and frequent exfoliation during and six months after the treatment course. Due to the enhanced metabolic function of the skin and accelerated absorption ability after the treatment, patients may have dry skin, so it is very important to provide sufficient nutrition and moisture to the skin and enhance moisturization. Whether the purpose of VPL treatment is to remove blemishes, remove redness, treat sensitive facial diseases or just to rejuvenate the skin, post-operative sun protection is crucial, avoiding outdoor exposure to the sun and suggesting topical sunscreen (physical, SPF 30, regardless of the season and indoor/outdoor), which will not only provide long-lasting treatment effects, but also delay and reduce the process and extent of photoaging with long-term use. For blemish removal treatment, discoloration may be aggravated after the first treatment, which can be gradually lightened after one week in general. For vascular wire removal treatment, avoid eating spicy and stimulating food during the treatment course, and avoid actions with excessive tension of facial blood vessels such as active forceful breath holding. Photoreceptor foods (such as various wild vegetables, acacia, celery, leek, parsley, etc.) and drugs (haloperidol, sulfonamide, ashwagandha, etc.) are prohibited during the treatment period. Very few patients may develop hyperpigmentation after treatment, which usually fades naturally in 3-9 months, and oral vitamin C, etc. may accelerate the fading rate.