I need antibiotics as i have green slime in my throat?

Doctor checks first: New throat pain 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. Typically, a person sees the doctor if the sore throat is bothersome, recurrent, or doesn't go away quickly (mainly to check for strep infection). Doctors usually have a rapid 5-minute strep swab test in clinics.