Final answer:
A complaint that indicates a complication following a lumbar puncture is abnormally cloudy cerebrospinal fluid (CSF), which may suggest an infection. Further testing is necessary to confirm the presence of microorganisms.
Step-by-step explanation:
Following a lumbar puncture, a client experiences several complaints. One complaint that indicates a complication is abnormally cloudy cerebrospinal fluid (CSF). Normally, CSF should be clear, and cloudiness may indicate an infection. However, further testing is necessary to confirm the presence of microorganisms. If a client complains of cloudy CSF after a lumbar puncture, it is important to monitor for signs of infection and consult with a healthcare professional for further treatment.