Jacelyn - RE: teething and fever
My baby has mild fever (very mild, like can barely feel that he got fever) and diarrhae (max 8 times a day, but not too watery, my mum called it "flowery") for almost 1 week when he was teething. But then the first tooth only pooped out like a month later. When the time actually pooped, no fever.
If you are unsure what is the cause for fever, don't simply link it to teething. It could be something else. Monitor closely and bring him to see PD as needed. Like Yvonne said, their immune system is getting lower after 6 months, when those antibody they got from our colostrum already exhausted, so be careful that baby is more prone to pathogen now. My friend's son got a very bad UTI as soon as he turned 6 months.