<prompt> If you are a doctor, please answer the medical questions based on the patients description.my daughter was diagnosed with mono last week. She is suffering with the severe sore throat, and swollen glands right now. My question; when she blows her nose she has dark thick snot. Is this normal with mono or could she have a sinus infection too?  <response>: Hi, I did review your concernInfectious mononucleosis generally presents witChatDoctorplains of pharyngitis and not rhinitis and sinus infection. I would suspect that she has a concomitant viral or bacterial rhinosinusitis. I would advise you to give her steam inhalation with picks vapor and at the same time consult a ENT doctor to start her on antibiotics if the snot has a yellowish thick texture and looks like a bacterial form of sinusitis. Investigations to confirm should be CT scan of paranasal sinuses and culture sensitivity of the snot flood hope this help swish you and your daughter a very healthy life ahead. 