Becoz of dryness! Have lots of fruits n water and keep ur affected skin moistursed always with a good quality moisturiser/stretchmark cream and may add some oil to it so it stays for long, don't itch the area. If itching is all over the body, see your Dr, u may need liver function <u>t</u><u>ests</u>;

Use good moisturiser if itching still persist consult your pedea he will suggest you some cream or powder it really helps

Could be coz of winter pls drink water and use good moisturizer