I had this for a few years. doctors prescribe steroids as a quick cure. that was why it repeated and cannot control. So if you apply cream ..... it will make matters worse.
lets look at the cause before finding a cure. the best cause is shared here for your consideration
1.外感：风寒或风热之邪客于皮毛腠理之间而发，如《诸病源候论》指出：“邪气客于皮肤，复逢风寒相折，则起风搔瘾疹。”、“夫人阳气外虚则多汗，汗出当风，风气搏于肌肉与热气并则生蓓癗。”明确指出了风寒、风热客于皮肤，或表虚不固，风邪乘虚侵袭而致病。- protect yourself from coldness.
2.内生：过食油腻厚味，荤腥等助火动风之物，如鱼、虾、蟹等，或因肠道虫淫，均可导致肠胃不和，风火湿热内生，郁于皮肤腠理而发。病久者气血被耗，以致血虚生风，（妇女会冲任不调），风邪阻于肌肤亦可发生本病。- control your diet. reduce oily and crispy stuff
I have treated this for the past 2 months the cause were identified to be: eating too much meat, oily, crispy food in the past, too much fire.... the poison created accumulated and was not expulled properly, it follow the wind (coldness) and appear along the inner side of the limbs...... the higher the poison content, the longer the treatment time. I almost gave up in the middle, and finally now after 3 herbal soup course (each 7 days) and daily moxibustion (针灸的灸法),以中药内攻热毒,以针灸外治疗风寒) 现在好了.
my friendly advice is do not apply any medicine without finding the cause, and try herbal medicine to work on the disease from cause.
PM me at firstname.lastname@example.org
if you need more information.