Lip swelling may be allergic, throat swelling may be excessive internal heat. You can take some anti-allergic drugs, such as chlorpheniramine. You'd better see a doctor.

Sometimes this symptom may be a precursor to the onset of "yellow sores", and there must be a fire in the body. If so, you can take some medicine for clearing away heat and toxic materials, and then apply some erythromycin ointment externally.