What is the reason why little red dot looks like a blood mole?

According to your description, it looks like purpura, which is subcutaneous bleeding. Did you get scratched? Or did you touch it

Nevus are localized skin pigment abnormalities, which can occur at birth or the day after tomorrow. There are red moles and black moles, which will remain unchanged for life.

Red nevus

Red nevus is the concentration of human qi and blood, so most people with red nevus are lucky.

Blood nevus

Blood nevus is acquired, which has a great influence on human health. Blood moles are as big as medlar and as small as small blood bubbles, which are common in chest, ribs, arms and lower limbs. The appearance of blood nevus suggests that fatty liver, cirrhosis and cholecystitis are prone to accumulation of phlegm and dampness, which is more common in patients with fatty liver and chronic hepatitis.