offcourse yes you must be concerned. This is an indication of an infection with a probability of spreading and causing a septicemia
and why not septic shock
Its advisable to inform your treating physician may be to change the catheter, to reevaluate the catheter site and fix it well.
Debridement of the zone shall be of utmost importance.
Secondly, debridement and sending of pus samples to the laboratory for cultures and sensitivity tests are of critical importance. blood tests especially blood cultures could e useful in actually evaluating the spread of the germ and identifying it. A urinalysis
, urine cultures and antibiograms could be an added advantage to increase probability of identifying this germ. Generally, if greenish in color, its usually Pseudomonas
species which are very sensitive to Quinolones.
You deserve a good clinical examination, especially reevaluation of the catheter site.
Thanks and hope this helps.