Skin that turns blue when touched is usually a symptom of purpura simplex, thrombocytopenic purpura or senile purpura.
1. The cause of purpura simplex is unknown, and estrogen elevation, vascular dysfunction, immune dysfunction, and some drugs and so on. This disease occurs in the lower limbs, mostly in young women, and it is easy to occur in patients who have been taking anticoagulants such as aspirin and clopidogrel for a long time.
2. Thrombocytopenic purpura is caused by a decrease in the number of platelets in the blood and abnormal coagulation function. The cause of this disease is unknown, and heredity and immune system function abnormalities, pregnant women are prone to.
3. Elderly purpura is caused by the loss of collagen and fat in the skin as the body ages. Collagen reduces skin capillaries to lose support, skin fat reduces capillaries without protection, so by the impact or shear force after the blood vessels are prone to damage rupture, the formation of subcutaneous bruises.
Skin bruising when touched suggests that patients seek medical attention in a timely manner to avoid delays in the condition.