The dog was hit on the head and suddenly couldn’t stand up a few days later. It may be epilepsy. Epilepsy usually occurs after being frightened or stimulated. And it is hopeless. As long as you are not stimulated and frightened, you will not get sick under normal circumstances. This cannot be detected. The main symptoms are stiffness of the whole body, unsteady walking, and convulsions.
If the puppy is hit on the head and can't stand up, the owner can use Drag his hind legs with your right hand to make the puppy into a three-dimensional shape, then push his neck back and forth, and tap his back at the right time to see if there is any response. If there is no response even if you tap his back, take him to the pet hospital as soon as possible. You can hold it gently and make sure it is okay and send it to the hospital immediately.
In addition, the dog may have intracranial hemorrhage or concussion. In such a situation, the only thing you can do is pray for him. If you can survive it, you may feel a little dull in the short term, not as flexible as before, and a little slow to respond to human instructions, and it will take a long time to recover.