What do you think this is? Look what popped out a few days later 😋 Scalp cyst removal with diathermy uses a fine needle that is inserted into the cyst to apply a gentle heat current (diathermy) to cauterize and soften it, which helps reduce its size and allows the contents to be squeezed out. This method is used to treat sebaceous, pilar, or epidermoid cysts and is considered a gentler approach compared to traditional cutting, though it may require multiple sessions for larger or more stubborn