Talk to Dermatologist on Itching On Hands

hello doctors....i want to ask mjhe pichle kch din se hath ki hathelion main bht kharish hoti hai or zada tar rat k time hoti hai thori dair hone k nad khud hi thk hojati hai kbi kbi pairon main b hoti hai.i want to knw k iska kia reason ho skta hai ?