Porphyria does not need to be treated by drinking blood. The idea that porphyrias must be treated by drinking blood is a very erroneous statement because in the past, medicine was not advanced enough and people knew very little about porphyrias. At the same time, due to the porphyria patients have a special face, many people will porphyria and vampire image associated together, it caused the porphyria must drink blood fallacy. Porphyria is an inherited disorder in which a deficiency in the enzyme involved in heme metabolism leads to excessive porphyrin deposition in the body, resulting in skin lesions, gastrointestinal symptoms, and neurological symptoms. The excessive deposition of porphyrins in the skin causes the skin to become hypersensitive to sunlight, which can lead to ulcers, scabs, bleeding, and recurring episodes, resulting in a horrific change in appearance. Some people associate the appearance of this patient with the image of a vampire, creating the myth that porphyrias must drink blood, so porphyrias cannot drink blood.