Can sinus infection cause high sed rate?

Yes, a sinus infection (sinusitis) can lead to a high sedimentation rate (sed rate), which is a marker of inflammation in the body. When the body is fighting an infection, such as sinusitis, inflammatory proteins are released into the bloodstream, causing the sed rate to increase. This elevated sed rate indicates an inflammatory response, although it is not specific to sinus infections and can be associated with various other conditions.