Tiny scabs and redness at the sites of the needle entry can be seen after Botox injections. Occasionally bruising may occur as well. These will both get better with time, usually less than a week. For some people Arnica may work to decrease the duration of bruising. Either way it will all resolve on its own.
Typically this heals on its own, but if it is there for more than 24 hours I suggest going back to your physician and showing the concerns. Best, Dr. Emer.