It looks like the injections sites from the needles. If this occurs it usually goes away in a few days. Best of luck on your trip,
They appear to be small bruises from the needles. Any time something is injected you are at risk for bruises, so you need to be prepared for that. Hopefully these minor bruises are all that show up and you can cover them with a bit of makeup. If they do get worse, most bruises are gone within 10-14 days. You can try topical Arnica available at health food stores and apply it to these marks. Some patients swear that it helps tremendously.
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cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."