The first time I noticed the phenomenon of post-interventional hair loss was a young girl with dark, shiny hair who had undergone interventional treatment for a sinus thrombosis and experienced severe hair loss two weeks after the procedure, which made her anxious and worried. At that time, I also lacked experience in this area, so I looked up the latest literature and learned that post-interventional hair loss is not uncommon. Interventional treatment requires exposure to a certain dose of radiation, and higher radiation doses may cause local skin damage. Transient erythema can occur on the incident side when receiving more than 2 G of X-rays at one time; transient hair loss can occur in 2-3 weeks when receiving 3-6 G at one time; however, irreversible damage to hair follicles can occur if the dose exceeds 7 G, resulting in permanent hair loss; if the dose is higher, exceeding 18 G, skin manifestations can occur with blistering, wet peeling, and later ulcers can develop. The younger the age, the higher the likelihood of radiation damage. Generally there are not many patients with severe hair loss after cerebral artery and cardiovascular interventions, while the patient I met was young and had a long procedure for venous sinus thrombosis and a high dose of irradiation, which are risk factors for radiological skin damage, so she developed hair loss. Of course, patients who need to undergo interventions need not be overly anxious; these side effects are rare and not serious compared to the benefits of interventions. Most of the hair loss caused by intervention is reversible, and new hair usually grows naturally within 2-3 months. A small number of patients are particularly sensitive to radioactivity and have fragile scalp after irradiation, so care should be taken to take better care of the scalp in general.