Pus is indicative of a bacterial infection (See doctor)
Inflammation of the lymphatic system also called "blood poisoning" designated (consult a doctor)
Poison or other substances (e.g. saliva) Therapy: A - injection site cooling with ice cream or quark compresses B - antihistamines in Tablet form or as gels and cortisone medication C - antibiotic therapy D - place cool with a sliced onion E - The scratching after Possibility to omit completely
You can find an overview of all Dr-Gumpert images at: medical illustrations