lol I never said medical ninjutsu is easy

Ok, next thing you must know is Tekishutsu (Extraction) Description: When a patient‟s body has a foreign object in it, such as the point of a shuriken, a senbon needle, or an arrow, it is important to remove the object without further harming the patient. Using this technique the medical nin places their hands on either side of the injured area and uses chakra to very carefully manipulate the surrounding tissues in order to remove the object without causing any further damage. Depending on the severity of the wound and nature of the object, it can take anywhere from a few seconds to a few minutes to remove it.
*Takes you to other room [the room where Sakura was training in at the end of the first part - before the time skip -] and there's a bunny with some senbons in his leg.*
Use this technique and try to heal it.