Final answer:
Pregnancy is the condition that increases the risk of plantar fasciitis due to weight gain and hormonal changes affecting the foot's structure, distinct from the diabetic neuropathic damage associated with diabetes.
Step-by-step explanation:
Pregnancy places a patient at an increased risk of developing plantar fasciitis. This is due to the weight gain and increased pressure on the plantar fascia, as well as hormonal changes that can lead to a relaxation of the supporting structures around the foot. While diabetes can also contribute to the risk, it can do so by damage through diabetic neuropathy rather than the mechanical factors seen in pregnancy.