Is he naughty while walking and jumping? NO! This is a distress signal! When the dog shows the following signs, the dog owner must be vigilant! Repeatedly licking the paws and the skin is red: this may be a sign of interdigital inflammation or interdigital cyst. Timely treatment is required; frequent head shaking and scratching of the ears: This may be a sign of ear mites or otitis, and it is recommended to seek medical treatment immediately.
distress signal 
When the dog shows the following signs, the poop scooper must be vigilant
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Repeated licking of paws, red skinThis may be a sign of interdigital inflammation or an interdigital cyst, which requires prompt treatment.
Frequently shaking head and scratching earsThis may be a sign of ear mites or otitis, so it is recommended to take it to a doctor immediately.
I want to vomit but can't. This situation is likely to be a cold, wet cough or respiratory disease and requires close observation.
Frequent blinking, tearing, or pawing at eyesThis could be a corneal abrasion, eyelid problem, or conjunctivitis, so be sure to get your dog checked out immediately.
Don’t dare to fall to the ground while walking.In this case, you should be alert to joint problems or patellar dislocation, which require prompt treatment.
Vomit with blood streaks and blood in itThis means that the dog’s digestive tract may be bleeding, which is very serious and requires immediate medical attention.
Frequently arching your back and stretchingThis is most likely due to severe pain caused by pancreatitis and needs to be investigated for diagnosis.
Drag your butt across the groundThis sign is likely to be anal gland blockage or parasite infection and should be dealt with promptly.