They put their hands in their mouth and basically anything they are playing with, they also have a warm forehead and neck.
A few things my little one does when she is teething is never wanting to give up her Binki. She usually only uses it for sleep, but when she starts to get a tooth, she wants it all the time. She also becomes very clingy and only wants to sit on my lap, she’ll run a slight fever and not want to eat a lot. After a few days of that, I can start to see the white line of the tooth about to pop through her gums. Once it starts to get to the top, she’ll want to chew on everything and she’ll want to snack on her crunch snacks.
My girl is almost 9 months and I can see her first tooth just barely through the gum! When I feel her gums with my finger it feels a little sharp in one spot. She has been drooling a TON, chewing on everything in one spot (where the tooth is coming) and at night she wakes a few times screaming in pain. I offer her my breast and she falls back asleep usually after a minute or two of squirming
Look for puffy gums, rosey cheeks, ear pulling, rubbing thier cheeks. They have lots of natural teething products. We really like Dr Talbots teething tablets and gum gel.