"Why Does the Skin on My Legs Itch?"

When itching symptoms occur on the skin of the legs, they may be caused by non-disease factors such as local irritation and allergic reactions. However, they can also be attributed to disease factors such as urticaria, eczema, neurodermatitis, scabies, and diabetic foot.

Non-disease Factors

1. Local Irritation: Prolonged exposure to excessively dry or humid environments can irritate the legs, leading to itching symptoms.

2. Allergic Reaction: Contact with allergens such as pollen or animal hair on the legs may trigger an allergic response, manifesting as the aforementioned discomfort.

Disease Factors

1. Urticaria: Commonly associated with food or drug allergies, it causes small blood vessels in the local skin and mucous membranes to dilate and increase in permeability, resulting in wheals on the legs accompanied by varying degrees of itching.

2. Eczema: The etiology of eczema is primarily related to genetic factors and abnormal immune function. Inflammation repeatedly irritates the skin of the legs, leading to the appearance of red papules accompanied by significant itching.

3. Neurodermatitis: May be associated with excessive mental stress or the consumption of spicy and stimulating foods, causing mossy-like changes in the local skin accompanied by intense itching.

4. Scabies: A contagious disease caused by Sarcoptes scabiei var. hominis parasitizing the skin surface of humans. During the process of scabies mite bites on the legs, it damages local tissues and releases toxins, causing significant itching.

5. Diabetic Foot: Typically refers to foot infections, ulcers, and gangrene caused by peripheral neuropathy and peripheral vascular occlusion. It can affect blood circulation in the lower extremities, also leading to itching in the legs.

Apart from the above common situations, there is also the possibility of systemic diseases such as liver and kidney dysfunction, uremia, etc. It is recommended to seek medical attention promptly for a definitive diagnosis.