Red blood spots appear immediately upon scratching the skin

Red blood spots appearing immediately upon scratching the skin may be caused by physiological factors, or by conditions such as eczema or psoriasis. Targeted treatment depends on the specific underlying cause. The details are as follows:

I. Physiological Factors

During the process of scratching the skin, local capillaries may dilate and become congested, leading to the appearance of red blood spots when the skin is scratched. In more severe cases, actual bleeding may occur. This is considered a normal physiological response and typically does not require treatment.

II. Pathological Factors

1. Eczema

Eczema is a common condition. When it occurs on the hands, it may present as small, millet-sized red papules, blisters, and other symptoms, often accompanied by itching. Scratching can rupture the surface of these papules, resulting in red blood spots.

2. Psoriasis

Psoriasis is a chronic inflammatory skin disease. Affected areas of skin may develop red plaques and scaly patches. Scratching the lesions can lead to the aforementioned symptoms.

In addition to the common causes listed above, other possible causes include contact dermatitis, urticaria, and allergic purpura. If any discomfort or unusual symptoms occur, individuals should promptly seek medical evaluation at a hospital for timely diagnosis and treatment.