Look at the target
A teething puppy often settles onto an object and works the back or sides of the mouth. A socially excited puppy is more likely to chase sleeves, ankles, hair, or hands that move away.
Look at the trigger
Chewing that begins during quiet downtime may be soothing. Mouthing that erupts during greetings, floor play, running children, or evening excitement is more likely connected to social arousal.
Both can happen together
A puppy with tender gums can still become overexcited. You may need both a suitable chew and a calmer interaction pattern.
What to avoid
Keep the response gentle.
Do not assume every bite is teething or that teething makes hard biting harmless.
Safety boundary
When to get more help.
Escalating bites, guarding, freezing, or injuries need assessment beyond routine teething support.