The resulting effects of an astronomically non-lethal impact on an otherwise lethal body zone (head etc). The triviality of the "welt" juxtaposed with the carnal seriousness of suicide produces a cocktail of true apathy, ineffectiveness, and inability.
Here's the first image showing the close-up of the head near the temple with normal, unblemished skin.
And now we're showing the first signs of redness or irritation forming on the skin near the temple.
The area starts to swell slightly, with the redness becoming more pronounced.
Notice the swelling becomes more noticeable, and a small bump starts to form.
The welt becomes more clearly defined, with redness and slight swelling around it.
So there it is.