According to the Following Discharge Summary, Ms

According to the following discharge summary, Ms. Cloud began complaining of ophthalmalgia. Hospital Course
On postop day 2, Ms. Cloud began complaining of increasing right ophthalmalgia. She was noted to be febrile to 102.2. Exam revealed conjunctival infection and edema. She was presumed to have postoperative endophthalmitis. Vitrectomy was performed under sterile conditions, and samples were sent to lab for culture. She was given intravitreal antibiotics. Over the next couple of days, her fever curve trended down and her WBC count improved. Cultures came back positive for S. epidermidis. Infectious disease was consulted; they recommended two weeks of IV therapy. A PICC line was placed and she was discharged with care instructions.
Which is the correct definition of the suffix -algia?

A) Cause
B) Hernia
C) Medical science
D) Pain
E) Specialist