Itchy skin, medically known as pruritus, is a common complaint that can range from mild annoyance to severe discomfort. When the itching affects the entire body, it can be especially distressing and sometimes points to underlying health issues beyond a simple allergic reaction.

Why Full-Body Itching Happens

Many people immediately suspect allergies when their skin itches, but generalized itching can have multiple causes:

Skin Conditions

Eczema (atopic dermatitis)

Psoriasis

Hives (urticaria)

Internal Medical Conditions

Liver disease: bile buildup can cause intense itching.

Kidney disease: toxins accumulating in the blood may lead to pruritus.

Thyroid disorders: both hyperthyroidism and hypothyroidism can trigger itching.

Diabetes: high blood sugar may dry out skin and irritate nerves.

Infections & Parasites