Here are some examples of blood blisters, including some close ups for better definition. Blood blisters are quite rare and are often mistaken for being granulomas.
Here are two examples of blood blisters on ear piercings. In the first you can see the dark round bump siting next to the top ball on the rook piercing. In the second the black blood blister is clearly visible on the bottom of a stretched ear lobe piercing.
In oral piercings blood blisters can appear quite dramatic. This blood blister on a tongue piercing is very raised but retains the distinctive dark colouring that blood blisters have on skin.
The bump also has a shiny coating of blood which can be cleaned away as it is just a collection of dried blood from the bump (which appears differently inside the mouth).
This particular bump was not painful and caused few problems for the owner but it did release small amounts of blood at regular intervals.
Blood blisters do not always appear very dark in colour but can sometimes be bright red as this picture clearly shows. They tend to stay close around piercings in the same way that this blister is keeping close to the toe nail.
They can also become quite raised and round, similar to an over-filled balloon as you can see towards the bottom of this blister.
This picture is a great close up of how blood blisters generally appear on the skin after physical trauma. They are often not very raised, appearing more as a small mark rather than a definite bump.
The dark colour is still very prominent and a clear indicator of blood being trapped under the skin.
Blow Out Picture Sources
The top photo of the rook piercing is courtesy of Emily via her post on the BodyJewelleryShop Forums.
The top photo of the stretched ear piercing is from a post made by natashadewater on the BodyArt Forums.
The photo of the tongue piercing blood blister is from AnnAof92’s Blog ‘Things I couldn’t google‘ where she recounts her experiences healing her tongue piercing and what the blister was like.
The photo of the red blood blister on the toe is from Laura Blodgett’s blog ‘Daily Improvisations‘ where she talks about foot care for running.
Finally the last photo of the two finger blisters is from Bye Bye Doctor’s article on Blood Blisters.