Which of the following is a sign of postpartum infection?

Increased pain at the incision site is indeed a sign of postpartum infection. After a cesarean delivery or any surgical procedure involving an incision, it is expected for some discomfort to occur as part of the healing process. However, a significant increase in pain or the presence of new, worsening pain can indicate an infection at the incision site. This pain can be accompanied by other signs of infection, such as redness, swelling, warmth, and discharge at the site.

A reduction in abdominal pain may be normal as the body begins to heal, and improving symptoms can indicate recovery rather than infection. Clear and odorless lochia signifies a healthy postpartum recovery, as lochia should progressively transition in color and odor without odor suggesting infection. Feeling better within a week is generally part of the normal postpartum recovery process and not indicative of infection. Therefore, the option that identifies increased pain at the incision site relates directly to a possible infection, making it the correct choice.