For immediate relief from tooth pain, you can take paracetamol or paracetamol with an anti-inflammatory. Rinse your mouth with warm salt water and avoid very hot, cold, or sweet foods. This will give temporary relief only. A cavity needs dental treatment (filling or root canal). Hence, please see a dentist as soon as possible to fix the cause of the pain.

Heel pain for two months may be caused by plantar fasciitis (inflammation of the tissue under the heel), stress fractures, or strain from prolonged standing, excessive walking, or wearing improper footwear. To ease the pain, rest your foot, wear supportive cushioned shoes, do gentle calf and heel stretching exercises daily, and apply an ice pack on the sore area for about 20 minutes. You may also take painkillers like ibuprofen or paracetamol if needed. If your pain does not improve, gets worse, or makes it hard to walk, please consult a doctor for proper evaluation and treatment.

Your symptoms suggest a pinched nerve in your neck (cervical radiculopathy), likely aggravated by cracking your neck, which you should stop doing. For temporary relief of pain and inflammation, you can take over-the-counter NSAIDs like ibuprofen or naproxen, or acetaminophen. However, because you have numbness in your hand, a sign of nerve compression, medication alone isn't enough. You must consult a doctor for a proper physical exam. They may prescribe nerve-specific medications (like gabapentin) or recommend physical therapy. Avoid sudden neck movements and seek immediate medical care if the numbness worsens or weakness develops.

For a severe toothache, you can take paracetamol or ibuprofen to relieve pain temporarily. Rinse your mouth with warm salt water and avoid very hot, cold, or sugary foods. This will only reduce pain temporarily. See a dentist for proper treatment.