Local anaesthetic injections for the removal of trichomatoid tumours on the top of the head usually do not affect memory because they are benign tumours of hairy origin, usually growing within the dermis, and are relatively small with clear borders.
In addition, trichoblastoma usually occurs in infants to middle-aged people, who are more tolerant of anesthetics and generally absorb them more quickly, with few side effects. There is no direct correlation between anaesthesia and postoperative brain function impairment, and as long as vital signs are stable and oxygenated during general anaesthesia, there is no damage to the central nervous system, let alone to memory.