[header] How to know if your child has scarlet fever [title] Watch for a sore throat. [step] Not all sore throats are caused by strep, but a sore throat is the most common symptom of strep. Be mindful of throat pain and difficulty or pain when swallowing. 
The effects of strep are often visible in the tonsils in the back of your child's throat. They may become red and swollen and might even develop white patches or show signs of pus.