Why does my dog yelp when I pick it up under the armpits?

A dog that yelps when lifted by the armpits may have a wound there, and touching it causes pain, so the reaction is strong. Clean the wound with disinfectant and apply anti-inflammatory medicine.

Second, if there is no external injury, it is likely a muscle strain or bone damage in the front legs. If you notice an abnormal walking posture, take the dog to a vet promptly and use anti-inflammatory and pain-relieving medicine based on the injury. Limit the dog’s activity lately and avoid jumping or climbing stairs.