Capillary dilation for too long can easily lead to localized dermatitis of the skin once the skin barrier function is disrupted. Capillary dilation mainly occurs on the face, and most of them are acquired skin damage, and some of them are congenital causes. If the capillaries are dilated for a long time, it may be aggravated by hot and cold stimulation, the skin barrier function is damaged, and slight external stimulation may trigger dermatitis or skin sensitivity, such as dry, flaky, red skin on the face, self-conscious burning, tightness and itching, affecting the aesthetics and quality of life. Once capillary dilation occurs, it is recommended to actively treat it in a timely manner, pay attention to hydration, sun protection, use medical skin care products with skin barrier repair function, and avoid topical hormonal ointments or irregular skin care products containing hormones. Avoid hot and cold stimulation, alcohol and spicy stimulating food. For those with severe symptoms, they can go to dermatology or plastic surgery in regular medical institutions and choose medical aesthetic treatments such as laser and photon, which can improve the local dilated capillaries to some extent.