In a small mixing bowl, combine the shredded chicken with the Frank's RedHot sauce. Stir well until the chicken is evenly coated.
Arrange the romaine lettuce leaves on a serving platter.
Spoon the buffalo chicken mixture evenly into each lettuce leaf.
Top each wrap with halved cherry tomatoes, sliced red onion, and two slices of avocado.
If desired, drizzle with ranch dressing before serving.
Serve immediately and enjoy these delicious Low Carb Buffalo Chicken Lettuce Wraps while fresh.