The Mobile PTSD Coach App in Acute Injury Survivors

Inclusion Criteria: * English-speaking adults seeking treatment in the ED * Adults between the ages of 18-65 * Sustained a musculoskeletal injury (e.g., fractures, sprains or strains, contusions, dislocations, crushing injuries and open wounds; and other chief complains involving the neck, back, or extremities) * Injury resulting from a motor vehicle crash (MVC) or motorcycle crash (MCC) that occurred within the past 24 hours * Eligible patients must own a mobile phone with short-message service (SMS) features (e.g., the ability to send and respond to text messages) and the ability to download apps * Participants must self-report that they experienced a potential traumatic event reflected by Criterion A of the DSM-5 PTSD diagnosis (endorse actual or perceived life threat and/or serious injury141,142) * Participants must self-report that they experienced a painful injury reflected by a pain score ≥4 using the verbal numerical score (0-10) in response to the question: "On a scale of 0-10, how severe is your pain?" * Patients with a past history of PTSD, but not currently receiving treatment (e.g., benzodiazepines or mental/behavioral therapy), are eligible for participation. Exclusion Criteria: * Presenting to the ED for a non-MVC/MCC (i.e., fall, assault) * Participants who do not own a mobile phone with SMS features * Participants with a pain score \< 4 or do not endorse Criterion A of the DSM-5 PTSD diagnosis * Spinal injuries * Major lacerations resulting in significant damage to subcutaneous tissue (e.g., degloving) and specific nerve injury (these injuries could lead to a distinct neuropathic pain syndrome) * Traumatic brain injury; Evidence of moderate to severe cognitive impairment secondary to trauma-related head injury (GCS\<13) * Self-inflicted injury * Time since trauma \> 24 hours * Non-English speaking; younger than 18 or older than 65 * Not medically stable or alert and oriented * Initiation of benzodiazepines and other psychotropic medications at time of ED visit * Initiation of mental or behavioral health therapy at time of ED visit * Currently enrolled in treatment (medication or mental/behavioral health therapy) for PTSD * Prisoners