Yes it's not good

Yes tattoo can lead many problems such as Tattoo may interfere in your sweating process If the tattoo making article is contaminated ,it increases the risk of developing blood borne disease such hepatitis, AIDS, Totto processure can lead to various bacterial infection It may lead to allergic condition to skin from ink So I would like to suggest u pls avoid as much as possible And if you want to it pls make tattoo from reputable place

Permanent tattoo is not harmful but there are a few points which you should take care of - 1. Get it done from a good and standard place. 2. Always ask the tattoo artist to use good quality ink and disposable needles since there is always chance of HIV spreading through used needles. 3. You can donate blood but you will not get selected for services like Army etc.

No But some dyes may cause allergies to some people

Yes it is.

You won't be able to donate blood to anybody. No blood bank one will accept your blood.

It isn't