Is it easy to get a concussion from brushing up and tapping against something like a fridge or stove?

Unlikely unless you: have had prior brain trauma. Concussion typically requires fairly violent knock of your head, which then sloshes your brain back and forward inside the cranium causing a coup and contre-coup injury. If you have symptoms of concussion though, you should see a neurologist or neurosurgeon right away. Thanks for trusting in HealthTap.