Hay, mama, yan ang baby's soft spot (fontanel), normal talaga, pero ang asymmetry na yan (one side soft, one side hard) ay worth checking with your pedia, ha. Better to have them see your doctor soon para ma-assess properly, lalo na kung first time mo ito napapansin. A few of us moms have had similar concerns, at laging okay lang, pero important na confirmed ng professional. Don't worry, pero get it checked to be sure!