Final answer:
Shaving before surgery is no longer recommended due to the risk of infection, skin irritation, bleeding, and interference with postoperative healing.
Step-by-step explanation:
Shaving before surgery is no longer recommended because it can increase the risk of infection, cause skin irritation, lead to unnecessary bleeding, and interfere with postoperative healing. Shaving can create microabrasions on the skin, making it easier for bacteria to enter the body and cause an infection. Additionally, shaving can cause skin redness, irritation, and inflammation, which can further delay the healing process after surgery.