Itchy skin all over the body may be caused by non-pathological factors such as dry environment, but it can also be due to pathological reasons such as urticaria, eczema, scabies, and diabetic peripheral neuropathy.

I. Non-pathological Factors

1. Dry Environment: In autumn and winter, the air humidity is low, which can easily lead to dry and dehydrated skin. Additionally, frequent bathing or using harsh cleansing products can accelerate the loss of skin moisture, resulting in the above symptoms. It is recommended that patients maintain appropriate indoor temperature and humidity in daily life to avoid excessive dryness. At the same time, they should reduce the frequency and duration of bathing, and choose gentle and non-irritating body wash products.

II. Pathological Factors

1. Urticaria: Urticaria is a common skin disease caused by the dilation of small blood vessels in the skin and mucosa and increased permeability, resulting in a localized edema reaction. Clinically, it is characterized by varying sizes of wheals, often accompanied by itching, and in severe cases, it can cause laryngeal edema. Patients can take antihistamines orally under a doctor's instructions, such as Loratadine Tablets or Levocetirizine Dihydrochloride Capsules.

2. Eczema: Eczema is an inflammatory disease caused by a combination of various internal and external factors, related to genetics, immune dysfunction, and other factors. Clinically, it is mainly manifested by papules, erythema, exudation, erosion, and other symptoms, accompanied by obvious itching. For mild eczema, no special treatment is usually required. If the condition is severe, topical glucocorticoid ointments should be applied under a doctor's guidance, such as Hydrocortisone Butyrate Cream or Mometasone Furoate Cream.

3. Scabies: Scabies is an infectious skin disease caused by the parasitism of Sarcoptes scabiei var. hominis. It is clinically characterized by small blisters and intense itching in thin and tender areas of the skin, often occurring in finger seams, wrists, and elbow pits. Patients can apply sulfur ointment or benzoic acid benzyl ester liniment locally under a doctor's guidance.

4. Diabetic Peripheral Neuropathy: Diabetic peripheral neuropathy refers to the damage of the autonomic nervous system of diabetic patients caused by various reasons. Its typical manifestations include sensory abnormalities, pain, tingling, numbness, and burning sensation. The occurrence of this disease may be related to long-term hyperglycemia, metabolic disorders, and other factors. Currently, there is no specific treatment for this disease, and the main approach is to take measures to alleviate symptoms based on the underlying disease. Patients should pay attention to controlling blood sugar levels, exercising regularly, and maintaining a healthy diet. In addition, allergies and other causes may also contribute to this condition, and patients should seek medical attention promptly for appropriate treatment.