Labs are not very sensitive to pain or cold, so they aren't "drama queens" when they are injured and you have to look for subtle signs something is wrong. It could be your dog was injured in some way and you did not notice, but a scab implies a recent injury. Have a vet check your Lab out if have any concern whatsoever.
The way to heal a scab on the scalp of a person's head depends on the size, and what caused the injury. A smaller scab could be healed by using peroxide. A large scab may need to be looked at by a doctor to determine the best treatment.
A scab
Did she get bitten? Did she scrape he back on her cage? Has she got mange? More info please.
Only with time. It will fall off. If you pick it off, it will bleed, and then it will take longer to heal.
No but if you pick it the scab will be a scar
The polish word for scab is strup
Someone had a scab which turned into a scar
Scar tissue is formed under the scab.
They can scab over and once the scab falls off, the ink may fade where the scab has been.
no, this is a myth you do not have to bleed to get a scab. They can be caused by merely a scrape or scratch.
The blood clots; leaving a scab. Then the body grows skin under the scab; once healed the scab falls off.
Odds are that it isn't a scab in that case. Get it checked out by a doctor.