Kyphosis is the medical term for an excessive forward curve in the thoracic spine. Dowager's hump and neck hump are two informal names for a related but more specific symptom.
A posture headache is muscle and joint-driven pain from neck strain, while a migraine is a neurological condition involving specific brain and nerve pathway changes, and the two respond to completely different things.
A neck reset is a short, targeted sequence of positional changes and muscle release techniques designed to interrupt the tension pattern behind a posture headache within minutes, instead of over days.
A posture headache, often called a cervicogenic headache, is head pain caused by muscle tension and joint strain in the neck, most often from forward head posture and rounded shoulders.