A sour nose all the time depends on the specific situation. If you have allergic rhinitis or sinusitis yourself, you need aggressive symptomatic treatment, and it also depends on how long this condition has been present. For the short term, you can take some oral medications such as loratadine tablets, loratadine syrup and topical budesonide nasal spray. If the condition is recurrent for a long time, you can do allergen testing to find the specific cause of the condition and avoid contact in your life, so as to solve the problem at root. In case of long-term recurrent attacks, sinus films can also be done to see if there are any problems with the nasal structure and to rule out some other organic lesions. Overall, find the specific cause for the sour nose and then treat it symptomatically.