Inclusion Criteria:  Male or female ≥18 and ≤50 years of age mTBI from any cause including impact, rotational acceleration, blast, or a combination, has occurred within the prior 7 days PTH has occurred within the prior 7 days Able to provide informed consent Likely to stay in the same geographical area for the duration of study Has a personal health care provider for standard of care PTH and TBI, including education, diagnostic procedures including neuroimaging and treatment, as deemed clinically indicated by the health care provider  Exclusion Criteria:  Sustained a moderate or severe TBI, rather than mTBI, indicated with at least 1 of the following associated with head injury:  abnormal structural imaging loss of consciousness for >30 minutes alteration of consciousness/mental state for >24 hours 3. post-traumatic amnesia for >1 day Participants with ongoing chronic migraine or other chronic daily headache disorders at the time of injury