My son is experiencing hoarse voice and vomiting. the following also describes him: nasal congestion. what should he do?

Doctor can examine: New nasal and throat symptoms can be from a strep throat infection (antibiotics are needed), a cold or influenza (antibiotics usually not used), or from some other cause such as allergies or irritants. Usually, a person sees the doctor if the symptoms are bothersome, recurrent, or don't go away quickly (mainly to check for strep bacterial infection). Viral infections resolve without antibiotics.