Thank you for your question. It is normal to have nasal congestion a week after septoplasty. After septoplasty the nasal lining is usually swollen from the surgery, which could cause nasal congestion or obstruction. The swelling will decrease with time, and usually the breathing improves as the swelling decreases. You may also have nasal stents or packing in place temporarily that could be causing your symptoms. Please follow-up with your surgeon with any concerns.
Best wishes for your recovery.