i got mine done a week ago and the piercer told me that i should wait to go at a pool about 2 weeks but he also told me that i could go anytime at the beach and also for tanning.
You should probably be good after a month or so
yes but only after 3 to 4 weeks
yes
yes
As you would without a navel piercing, just be sure the navel piercing is the last thing you clean before you exit the bath.
if its new not alot.if its an older piercing it does not matter
Well if you are doing your aftercare correctly you should be getting the piercing wet every time you clean the piercing.
Your question "Can navel piercing migration be down to growth" makes no sense.
You aren't supposed to tan indoors after getting a navel piercing because of the UV rays can dry out your piercing and make it uncomfortable, and if the lotion gets into your piercing it can get infected. Your piercing may take 6-12 months to heal so until then you should take good care of it and avoid tanning and swimming. You should wait until the weather cools down to get your piercing so then you have all winter for it to heal.
She can still keep her navel piercing in.
If it hangs or dangles chances are good that it will retain a piercing. Placing the navel piercing off to the side will be problematic for aftercare and irritation during the healing process. If you haven't had a navel piercing before then stay with something that is simpler to care for and will give a result a navel piercing is supposed to give.
Navel piercing could cost anywhere between Rs 350 and 500 with navel jewelery done by experienced piercer.