It is best to take a shower 24 hours after the lancet is inserted. After the lancet is inserted, a waterproof sterile transparent cloth is wrapped around the wound to prevent water from entering the wound and becoming infected, and if it is a large body shower like a bath, the bath water can easily flow into the wound and then become infected. If the patient has finished treatment and the indwelling needle has been withdrawn from the body, it is recommended that it is best to recover for 3-5 days and wait for the wound to recover completely before taking a shower. In addition patients with indwelling needles also need to pay attention to the pierced arm not to engage in heavy physical activities, do not instantly exert too much force and repeatedly move for a long time, can do daily life chores such as brushing teeth and washing face, need to pay attention not to bring the needle out, and do not compress the pierced side of the limb when sleeping.