A mosquito pierces the skin with its proboscis, introducing saliva in the process.
Right after this contact, the skin displays no difference. Its surface stays even, colored as before, and unmarked by any spot or elevation.
Minutes accumulate into hours, but the skin's look remains unchanged. No hue shift occurs, no protrusion develops, and the area blends seamlessly with nearby tissue.
After this interval, usually a few hours later, a red bump emerges precisely where the puncture happened. The mark now contrasts sharply with the rest of the skin.
The bite's effect lingers beneath the surface through the latency phase, with the observable sign arriving only after time has passed.