Here's what I recommend:
* Contact your veterinarian immediately. They can examine your dog and determine the cause of the bump.
* Observe the bump closely. Note any changes in size, color, or if your dog seems to be in pain or uncomfortable.
* Avoid trying to treat the bump yourself. This could potentially make it worse.
Possible causes of a pink bump:
* Insect bite: A common cause, usually harmless.
* Allergic reaction: Could be caused by a variety of things like fleas, pollen, or food.
* Skin infection: May be caused by bacteria or fungi.
* Tumor: Less common, but possible.
Remember: Only a veterinarian can properly diagnose and treat your dog's condition. Don't hesitate to seek professional help!