Hello and welcome to ‘Ask A Doctor’ service. I have gone through your query and can understand your concerns. As per your complain, if there is extreme nasal congestion when diagnosed with sinus infection then it is due to accumulation of thick infected mucous in the sinuses and as the sinuses drains through nose, there is congestion in the sinuses. At times there is formation of mucous plugs that do not drain off and cause severe congestion. I would suggest you to consult an otolaryngologist and get evaluated. A thorough clinical evaluation and investigations like PNS view x-ray or MRI scan can help in diagnosis and treatment can be done accordingly. You can be advised a course of antibiotics, anti-inflammatory painkiller like Ibuprofen, decongestants like Pseudoephadrine, do saline nasal irrigation, steam inhalation and use a humidifier in your room. You can also be advised decongestant nasal sprays containing Xylometazoline or Oxymetazoline. Avoid spicy and chilled foods. Do warm compresses around nostrils. Hope this information helps. Let me know if I can assist you further. Thanks and regards, Dr. Honey Nandwani Arora