For occasional severe headaches, over-the-counter pain relievers like ibuprofen, acetaminophen, or a combination formula containing caffeine can help. However, because severe headaches can be migraines or sign of an underlying issue, I highly recommend consulting a doctor for a proper diagnosis. They can prescribe targeted treatments like triptans if necessary. Please seek emergency medical care immediately if your headache is sudden and explosively severe (a 'thunderclap' headache), or if it is accompanied by fever, a stiff neck, confusion, numbness, difficulty speaking, or vision changes.

For temporary relief from severe tooth pain due to a cavity, you can take an over-the-counter pain reliever like Ibuprofen (400 mg) every 4 to 6 hours, as it helps reduce inflammation. Alternatively, Acetaminophen (500 mg) can be used. Always take these with food to avoid stomach upset. Do not place any pain relief tablets directly against your gums, as this can cause chemical burns. Please remember that medication only masks the pain temporarily; it does not cure the cavity. You must consult a dentist as soon as possible to treat the decay and prevent a deeper, more painful infection.

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 your fever, headache, and body aches, over-the-counter medications like Acetaminophen (Tylenol) or Ibuprofen (Advil) are very effective. If you choose a multi-symptom cold and flu medication, check the label carefully to ensure you do not accidentally double up on these active ingredients. Be sure to get plenty of rest and stay well-hydrated with water or warm fluids. If your fever persists for more than three days, you develop difficulty breathing, or symptoms worsen, please consult a doctor immediately.

For widespread back and neck pain, over-the-counter options can provide effective relief. You may try acetaminophen to help reduce pain, or a nonsteroidal anti-inflammatory drug (NSAID) such as ibuprofen or naproxen to target both pain and inflammation, provided you have no underlying stomach or kidney issues. Applying a warm compress to relax the muscles or an ice pack to reduce inflammation can also help. Please follow the package instructions carefully. If your pain is severe, persists for more than a few days, or is accompanied by numbness, tingling, or weakness in your arms or legs, please consult a doctor for a personalized evaluation.

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.