In winter my skin gets badly cracked so hand cream is indispensable.
During winter my skin gets really cracked so I have to use hand cream.
In winter my hands get really chapped so I rely on hand cream.
日本の冬は特に空気が乾燥しますよね。
冬場 = winter; winter season
皹＝あかぎれ＝cracked skin; split skin; chaps
手の皹 ＝ chapped hands (例 my hands get chapped）
欠かせない＝ vital; indispensable
I have to use = 使わなければならない
I rely on 〜 ＝ 〇〇 に頼る
アメリカ合衆国 
