Disclosed is an apparatus for treating blood vessels in the skin. The present invention comprises: a plurality of electrodes inserted into the skin, as an object of treatment, and applying an electric signal to blood vessels in the skin； an electric signal generator electrically connected with the plurality of electrodes； and a power supply unit for supplying electric power to the electric signal generator. According to the present invention, a suitable thermal damage is applied to blood vessels in the dermis or epidermis, which are causes or aggravation factors of freckles, vascular freckles, pigmentation, rosacea, flush, erythema, or hemotelangiosis, to normalize abnormal hyperproliferation in the causative blood vessels or induce phagocytosis or apoptosis of vascular cells of the causative blood vessels, thereby improving the treatment effect, reducing side effects that occur due to excessive thermal damage applied to blood vessels in conventional treatment methods, and lowering the recurrence of freckles, vascular freckles, pigmentation, rosacea, flush, erythema, or hemotelangiosis, through the revascularization of removed blood vessels.
