I haven't had any black specks that move but, yes, parasites can be anywhere in the body. I have felt crawling at night, it feels as if something is crawling inside of my two teeth with caps. I put oil of oregano on a q-tip and put it around on my gums each night and morning, if it is too strong and kinda burns, add water to the q-tip. You may want to put some in a spray bottle and spray around the inside of your mouth and tongue. This has stopped the movement I had felt, now I only do it once a week.
Don't be so grossed out that you do nothing, you need to get these nasty critters out of you, do parasite cleansing also.
Come back to this site for more support and suggestions anytime, heyjude