1 the use of the same consonant (consonantal alliteration) or of a vowel, not necessarily the same vowel (vocalic alliteration), at the beginning of each word or each stressed syllable in a line of verse, as in around the rock the ragged rascal ran.
People with tattoos CAN donate blood (at least here in America they can). A person just has to wait six months after getting a tattoo before they can give blood, according to the Red Cross. This goes for piercings, too.
Yes, it is true that you cannot donate blood for till 6 months after being tattooed. This is because blood donated by such people carries the risk of being infected as it involves the use of needles. This is just an infection control measure. Caution is important to cut chances of infection.