My 7-year-old son got his DPT vaccination three days back as his vaccine was missed when he was 5 years old. He has severe pain, swelling, and stiffness in the left deltoid at the site of the vaccine. I am giving him Meftal P as there was no improvement with Ibugesic plus. Can I use Thrombophob or Magsulf ointment? Can I use a hot water bag?