The cause of cracked corners of the mouth is malnutrition and lack of nutrients (German)
Style Book magazine reported that lips are a mirror of health, as their appearance can indicate several health problems.
The magazine, which deals with health and beauty, explained that cracked lips may be due to a lack of fluids in the body, and may indicate an inflammatory skin disease, such as neurodermatitis, if the crack is accompanied by other symptoms such as a feeling of burning and tightness.
The cause of cracked corners of the mouth lies in malnutrition, lack of nutrients, or a fungal infection, while the appearance of blisters on the lips indicates herpes infection.
The magazine added that swelling of the lips may indicate an allergy, especially if the swelling of the lips is accompanied by a burning and itching inside the mouth, while the pallor of the lips indicates a deficiency of iron in the body.
The change in lip color to blue is an alarm bell, indicating the presence of a serious health problem, such as a lack of oxygen resulting from lung or heart problems, a circulatory disorder, or poisoning.
Source: German