If you have an URTI, you may display these symptoms for up to a week: Fever Cough Phlegm Tiredness Sore throat Loss of appetite Swollen lymph nodes Slight body aches or headache Sneezing, runny nose or blocked nose Nasal and cough symptoms can last longer, sometimes for up to 4 weeks. For example, swollen lymph nodes can last up to 2 weeks.