1. In a mixing bowl, combine shredded chicken and buffalo sauce.
2. Heat a skillet over medium heat and warm the tortillas for about 30 seconds on each side.
3. Place a warmed tortilla on a flat surface. Add a portion of the buffalo chicken mixture, shredded lettuce, diced tomatoes, and a drizzle of ranch dressing.
4. Roll up the tortilla tightly, folding in the sides as you go. Repeat with the remaining tortillas and filling.