If your sore throat persists or worsens, it could be a sign of other illnesses such as tonsillitis, ear infections, sinus infections, Scarlet fever, rheumatic fever, or airway obstruction. Tonsillitis can cause red and swollen tonsils, while ear infections can result from a throat infection spreading. Inflammation and congestion can lead to sinusitis, and Scarlet fever, a rare but highly contagious disease, is associated with a sore throat and transmitted through coughing. Rheumatic fever, a complication of Strep A infection, can cause joint pain and heart problems. If you have had rheumatic fever in the past, it's important to closely monitor future sore throats. In rare cases, sore throats may cause difficulty breathing, which should be taken seriously and may require medical attention.
