Dry Skin (Xerosis): This is often the most common cause of itching skin, especially in dry environments or during winter months. It's a straightforward diagnosis that can be managed with moisturizers.

Eczema (Atopic Dermatitis): A chronic condition characterized by itchy, inflamed skin. It's common in individuals with a history of allergies or asthma.
Allergic Contact Dermatitis: An allergic reaction to substances like metals, latex, or certain chemicals, leading to itchy skin.
Psoriasis: An autoimmune condition causing itchy, scaly patches on the skin.
Flea or Insect Bites: Especially in individuals with pets or those exposed to insects, these bites can cause significant itching.

Scabies: A parasitic infection caused by the scabies mite, leading to severe itching, especially at night. It's highly contagious and requires prompt treatment.
Lymphoma: Certain types of lymphoma can cause itching due to the release of substances that stimulate nerve endings.
Thyroid Disorders: Both hyperthyroidism and hypothyroidism can cause itching skin, though the mechanism is not fully understood.
Kidney or Liver Disease: Itching can be a symptom of advanced kidney or liver disease due to the buildup of toxins.

Pityriasis Rosea: A rare skin condition characterized by a rash and itching, often following a viral infection.
Dermatitis Herpetiformis: A skin manifestation of celiac disease, causing itchy blisters.
Neurological Disorders: Certain neurological conditions, such as multiple sclerosis or peripheral neuropathy, can cause itching sensations due to nerve damage.
Mastocytosis: A condition where mast cells accumulate in the skin, leading to itching, hives, and other symptoms.