Blister Fluid Colours: What’s Inside Your Blister?
The colour and consistency of blister fluid can range from thin and colourless, to a thick yellow, to all shades of pink, red, dark purple and also black. Each colour tells you something specific about your blister.
Therefore, in this article, you’ll discover what’s inside your blister to make it looks the way it looks, and what it all means.
1) Plasma – Colourless blister fluid
Normal “healthy” blisters have a thin colourless liquid in them. This normal blister fluid is similar to plasma but has a lower protein level. Plasma is basically blood without the red blood cells. In fact, it’s mostly water, which is why blisters normally have no colour.
2) Pus – Yellow fluid
Pus is yellow and thicker than the normal fluid found in blisters. It consists of dead white blood cells and bacteria with tissue debris and serum. The presence of pus means your blister is infected.
3) Blood – Pink, red, purple fluid
When there’s a bit more pin-point pressure involved in the blister injury, blood vessels slightly deeper to the normal blister can be damaged. As a result, blood enter the blister and mixes with the normal fluid. The more blood that enters, the more red it will be. After that, as the days go by and the blood dries, the colour gets darker and turns to a dark purple or even black clour.
Above all, yellow infected blisters are the worst blisters to have. That’s because infections can be dangerous if left enchecked. Pink, red and purple blisters are usually the most painful. Other than that, colourless blisters are the best blisters to have – if there is a good blister to have 😉