It is very likely that the plastic surgery hospital destroyed some key tissues of the nose for technical reasons during the operation. Only a doctor with rich clinical experience can check it out. Most hospitals just do a CT to see if there is anything missing from the tissue in the nose. If there is nothing missing, the nose is fine, but some tissues and functions may be damaged only by a thin film, which affects the function, or because of surgery. Inflammation occurs in the part of the nose that is not in direct contact with the outside world at ordinary times, forming potential edema, compressing the blood vessels in the deep part of the nasal breathing, and causing symptoms similar to cold and stuffy nose. This can't be detected by machines, and doctors with rich clinical experience are needed. Many plastic surgery hospitals lack professional medical qualifications for nasal surgery. There have been cases in which doctors with poor qualifications accidentally destroyed the wetting function of the nose during nasal plastic surgery, resulting in postoperative breathing and dry nose pain. I suggest you try to find an expert doctor for diagnosis. If the diagnosis is that the nose function is damaged due to surgery in a plastic surgery hospital, you can ask for compensation, unlike what they say, you are only responsible for your appearance.