Head and neck cancer includes cancers that develop in the mouth, throat, nose, sinuses, salivary glands, and lymph nodes in the neck. Risk factors include tobacco, alcohol, HPV infection, and poor oral hygiene. Symptoms vary but may include persistent sore throat, difficulty swallowing, voice changes, neck swelling, ear pain, and mouth or jaw swelling. Treatment options depend on the cancer type and stage and may include surgery, radiation therapy, chemotherapy, targeted therapy, or immunotherapy. Early detection is crucial for better treatment outcomes.