Thanks for the query. Based on your description it looks like a superficial bacterial infection usually caused by staphylococcus aureus. As antibiotics starts working, the swelling should decrease. However you can consider compresses and anti-inflammatory medications like paracetamol.
Next Steps
Kindly consult a dermatologist for exact diagnosis and a precise treatment plan. Its also important to prevent their relapse once you have got it cured.
Health Tips
A decolonization regimen suggested by your doctor will help