Aw, yung nangangatal is usually just part ng teething or drooling stage, kaya very normal sa age na yan! A few of us mums noticed din sa aming babies around that time na parang sobrang saliva production, especially pag excited or crying, kaya nangangatal talaga, but just to be safe, I'd suggest mentioning it to your pedia sa next checkup para ma-rule out kung walang skin irritation or eczema na nagsisimulan, lalo na kung nakikita mo na red or swollen ang area. Likely yan lang normal phase, but peace of mind is always worth it!