What are symptoms of the common cold and what are signs that it is something more serious?

Sx's. Common cold symptoms include: Cough, congestion, watery eyes, sneezing, sore throat, mild headache, low grade fever & mild body aches. According to Mayo Clinic Flu sxs may include “Fever over 100F (38C), Aching muscles, especially in your back, arms and legs, Chills & sweats, Headache, Dry Cough, Fatigue and weakness, Nasal Congestion.”
See below. The common symptoms of a cold are sore throat, runny or congested nose and in 30% of cases dry cough. Signs that it may be more serious include pus on the tonsils, tender swollen lymph nodes in the neck, high fever with chills, shortness of breath and altered levels of consciousness.