Upper respiratory infections can include orange in the diet; these infections are usually viral, and typically there are no specific therapeutic drugs available, only symptomatic treatment is provided. Additionally, patients should also consider eating some fruits and drinking more plain water while maintaining a light diet; fruits like oranges and apples are suitable. Furthermore, patients with severe symptoms of upper respiratory infection may also need to use some cold medicines to alleviate their symptoms. Generally, upper respiratory infections are self-limiting, and patients can gradually recover with symptomatic treatment and dietary adjustments mentioned above. However, it is important to note that some upper respiratory infections may be bacterial, such as acute suppurative tonsillitis, which is a bacterial infection and requires anti-infection treatment.