Mama, please check with your pediatrician right away, ha, kahit medyo unusual yan na mainit lang ang ulo without fever sa katawan. Better safe than sorry with one-month-old babies, kaya mag-call na sa doctor or punta sa clinic para ma-check properly. A few of us moms always say na kung may something different sa baby, especially sa ganyang edad, hindi dapat i-ignore, better to get peace of mind from the doc! Take care po.