Not identifiable from the image; possible insect bites

Cannot determine without seeing the organism or clearer evidence such as a specimen, close-up, or environmental context.

Unknown.

The visible red bumps are a skin reaction, not diagnostic evidence of a particular insect. Similar marks may result from mosquitoes, fleas, bed bugs, mites, irritation, or other causes.

Usually minor, but seek medical care for spreading redness, severe swelling, warmth, pus, fever, breathing difficulty, or facial swelling. Avoid scratching and monitor whether new lesions appear, especially after sleeping.