Colds and coughs with a lot of white phlegm can be relieved by a variety of treatments, commonly used general treatment, symptomatic treatment and so on. 1. General treatment: During the cold period, you can adjust your lifestyle, ensure enough sleep, regular work and rest, drink more water, eat a light diet, avoid spicy and stimulating food, strengthen nutrition, pay attention to nasal and hand hygiene. 2. Symptomatic treatment: when the throat is itchy, you can take watermelon cream tablets, herbal coral tablets, etc.; when there is a lot of white phlegm, you can use expectorant drugs such as bromhexine, acetylcysteine, etc., and note that you need to be guided by a professional doctor to use the drugs. If you have a cold with a lot of cough and white phlegm and itchy throat, it is recommended that you consult a hospital in time and take medication under the guidance of a professional doctor.