A low-grade fever describes a body temperature slightly above normal. Most people consider a body temperature above 99.5 F but not higher than 100.3 F (38 C) a low-grade fever. Though a low-grade ...

Psoriatic arthritis (PsA) flare-ups may sometimes cause the onset of fever. This may be due to PsA itself, an infection, a medication side effect, or other related medical conditions known as ...