For temporary relief of your tooth pain and headache, you can take over-the-counter pain relievers like Ibuprofen (400 mg) or Acetaminophen (500 mg) every 4 to 6 hours, following package directions. However, since these symptoms have persisted for a week, they likely indicate an underlying dental infection, abscess, or sinus issue. Painkillers will only temporarily mask the pain; they cannot cure an infection. You must see a dentist promptly for a proper diagnosis and treatment (which may require prescription antibiotics or dental work). If you develop facial swelling, fever, or difficulty breathing, please seek emergency medical attention immediately.

Your symptoms of pain behind the knee radiating down your leg could indicate sciatica (a pinched nerve in your back), a Baker's cyst, or potentially a Deep Vein Thrombosis (DVT), which is a serious blood clot requiring urgent evaluation. For temporary relief, over-the-counter pain relievers like ibuprofen or acetaminophen may help, provided you have no contraindications. However, because constant, radiating leg pain can stem from vascular or nerve issues, I highly recommend consulting a healthcare professional promptly for a physical exam and imaging (like an ultrasound or MRI) to establish an accurate diagnosis and safe treatment plan.