It cause by heat pls stop using any foregin cream u can use sheabutter and kernel pomade ,but u can buy babytrebotan to clear it first before using sheabutter/kernelpomade as d cream
It happened to my baby too wen he was three months it's called alefo in yoruba language my doctor prescribed mupiderm cream and antibiotics cefuroxine axetil ND it really worked but I still use agbo along with it u can try it too