Bloody birthmarks?

How could Li Tian's left palm have such a bizarre birthmark?

It turned out that Li Tian was practicing the Tai Chi Qi-gathering method when he was practicing that: (sole respect for himself) because he was too anxious, which led to the disorder of tendons and veins at that time... At that time, Li Tian was extremely dangerous in the dark air defense hole, even he almost went into the devil. Li Tian, in great surprise, quickly adjusted his true breath, then slowly led the messy real breath of his body to his left hand. Now the blood-red birthmark in the heart of his left hand is the...