titanium microdermal hip piercings?

If your CT or MRI scan is in the area of the microdermals, you will end up with artifacts on the films. Any metal will do this. You may not be able to get an MRI done at all, even though implant grade titanium is non-ferrous (and therefore non-magnetic). If you think you will need one of these scans, it's best to wait to get the microdermals to avoid headaches. They are not as easily removed as regular piercings.

You need to be 18. No one worth their salt will do them for someone under 18, regardless of parental consent.

Healing time varies, depending on your body and the location. Most are healed pretty well after a few months.

Changing the bead is pretty easy, it just screws off. It's best to wear flat disks until they are healed, and not change the beads too often after that, as moving the jewelry can cause it to reject.

i have the same exact piercings you want. i love them, and they look amazing. i get so many compliments on them. it hurts pretty bad, but not as badly as you're imagining. each one takes about five minutes a piece. getting the jewelry changed hurts also, because they need to pinch the post of the anchor to replace the bead, but they end up pinching your skin... it hurts. but overall, it's definitely worth it! it doesn't get in the way or anything. the only thing is, if you use a shower poof, you'll need to like put your finger over the anchors while you wash your stomach so it doesn't catch and pull it. also, but h2ocean spray during the healing process. oh, and when you get it done, don't look down and watch! good luck, you'll love it.

Someone I talked to about her micro dermal back piercings said they hurt like hell when she wants to change them- she has to go back to get it changed. I thought it looked really cool. She had diamonds on hers :D

I'm not sure... You may want to talk to a doctor about this one, because for most scans & things, they want all body jewelry removed.

18.

A couple of months - same time as a piercing.

They are impossible to change. Or are you just talking about the jewel on the top? Those I imagine just screwing out easily.