What is scar fma tattoos?

The scar tattoo in Fullmetal Alchemist is a symbol of Ishvalan resistance. It represents the flames and destruction of Ishval, where the people were massacred by the military. The tattoo itself is a series of branching and intersecting lines that emanate from a central point, with small circles symbolizing the deaths of Ishvalans. Scar, the character in the show, has this tattoo on his left arm from his time as an Ishvalan warrior. It also serves as a reminder of his past and his motivations for seeking revenge against the State Alchemists. Scar’s tattoos also have the ability to use alchemy through clapping or touching the tattoos.