This morning i coughed up abit of blood in my phlegm i've had abit of a sore throats and the rest of the day i've been fine ?

Dr. can check throat: New throat pain can be from a strep throat infection (antibiotics needed), a cold or influenza (antibiotics usually not used), or from some other cause such as allergies or irritants. Usually, a person sees a doctor if the sore throat is bothersome, recurrent, or doesn't go away quickly. It's hard to tell if phlegm is from the nose, throat, or lungs, but persistent bloodiness would need an exam.