Ay, that's a long time para nandyan na yan since 7 months, kailangan talaga na i-check ng doctor, lalo na kung hindi umuubra or tumaas pa lang ang swelling kahit ngayon na 2 years old na siya. Could be maraming things, from a cyst, to fluid buildup, or something na need monitoring lang pero important malaman ng pediatrician kung ano exactly at kung may gagawin about it or just observe pa lang.