Is the scar from a submental chin reduction typically very noticeable?

The scar below the chin is typically undetectable, unless someone was looking at you from below your chin. Many people have scars under or near their chin from injuries in the past, especially from childhood. 

One way of determining if yours would be noticeable is to think about how your scars have healed in the past. 

Do you have raisedDo you have red scarsAre your scars usually flat? 

Some people are more prone to raised scars while others are not. Another thing you may consider is scar massage once the incision is properly healed. This can flatten the scar as the tissues are remodeling.

In general, the scars under the chin heal imperceptibly. In fact, 25% of the population has a scar under their chin from falling as a child or other reasons. That being said, if you have difficulties with scar healing, it is possible the scar could be noticeable or not heal well requiring additional surgery.