Headache complexity (number of symptom features) differentiates post-traumatic from non-traumatic headaches.
Scher AI, McGinley JS, Wirth RJ, Lipton RB, Terrio H, Brenner LA, Cole WR, Schwab K. Headache complexity (number of symptom features) differentiates post-traumatic from non-traumatic headaches. Cephalalgia. 2021 04; 41(5):582-592.