My wife has a constant wet cough and heavy chest and started getting headaches, is this a flu sympton and what cn she tk forbthese?

Lower respiratory : Symptoms of a cough with mucus production often indicates an infection in the lower respiratory tract like bronchitis or even pneumonia. It is important to remain well-hydrated and if fever begins or symptoms of difficulty breathing start, a physician should be seen to evaluate the possibility of pneumonia or another cause for these symptoms.