<prompt> Pulp space infection painful due toDense fibrous septaeSmall phalynxRich blood supplyRich nerve supply  <response>: Pulp space infection felonPulp space infection with pus trapped between the specialized fingeip septae cause intense fingeip painIt may lead to terminal phalangeal bone infection, erosion and sequestrum formation. The last of these will need to be drained and debridedA common differential diagnosis with small vesicles and crusts is the self-resolving herpetic whitlow, especially in dental workers, caused by the herpe simplex virusRefer: SRBs Textbook of Surgery, 5th edition 