We need to clip hair at any site that is having an invasive procedure performed, e.g. catheter placement, epidural, surgical site. This is first to prevent infection which can be catastrophic to the patient (can result in serious illness, loss of a limb or even death). Secondly, we clip hair to allow correct and accurate localisation of specific sites where procedures are formed. The presence of hair often means that these small sites can be impossible to feel to allow a procedure to be performed safely.