Red Blood Threads
Red blood threads refer to a facial skin sensitivity phenomenon caused by poor dilation of facial capillaries, damaged stratum corneum, or the relatively shallow location of some capillaries. The appearance resembles a spider web with intersecting lines distributed across the face. In severe cases, these threads can connect and form patches, leading to a red face. This type of skin is generally thin and relatively sensitive, and factors such as cold, heat, emotional excitement, or sudden temperature changes can make the face appear even redder.
For individuals with facial red blood threads, their faces often appear redder than normal skin tones. Some patients experience redness on both cheeks with circular boundaries, and in severe cases, this can lead to pigmented spots.
Causes of Red Blood Threads
There are many causes for the formation of red blood threads, which can be divided into primary and secondary categories.
Primary cases are mostly due to congenital inheritance, meaning that one's parents or family members may have had this condition.
Secondary cases usually arise from the following situations:
- Regional factors (such as high-altitude climate stimulation, where the altitude is high, leading to oxygen deficiency in the skin, increasing the number of red blood cells, and causing capillary dilation and rupture),
- Physical factors (cold stimulation, dry air, sandy weather, sun exposure, making capillaries exceed their normal tolerance, leading to dilation and rupture),
- Occupational factors (such as chefs or welders who are exposed to flames),
- Beauty care factors (such as the destruction of acid components in skincare products, hormone-dependent capillary dilation and rupture, and weakened skin immunity due to skin renewal treatments. Regular facials at beauty salons can also cause vessel dilation and rupture).
Complications from local or systemic diseases can also cause capillary dilation and rupture.
Ultraviolet radiation (strong UV radiation damages the stratum corneum, leading to poor capillary dilation performance and red blood threads), having undergone procedures like dermabrasion (photorejuvenation, etc.) that damage the stratum corneum and cause red blood threads, using cosmetics containing heavy metals (toxin residues on the epidermis cause hypersensitivity reactions, damaging the stratum corneum and triggering red blood threads), long-term use of corticosteroid drugs on specific areas (causing capillary dilation, resulting in thinner and atrophic skin), living in cold regions or suffering from frostbite (impeding blood circulation, stagnating vessels, and causing visible red blood threads on the face).
Sensitive skin typically has a thin stratum corneum, making it more susceptible to external factors such as sunlight, medication, cosmetics, and temperature (cold or heat). This leads to alternating constriction and dilation of peripheral vessels, presenting a recurring state of stasis, causing vessel tortuosity and expansion, and forming red blood threads.
Long-term wind exposure damages the stratum corneum; excessive temperature differences between cold and heat cause excessive capillary dilation; improper use of cosmetics harms and thins the stratum corneum; capillary oxygen deficiency leads to poor circulation and vessel necrosis; long-term skin malnutrition, allergies, and dehydration exacerbate the condition.
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