In my experience, following areas of the body parts are generally considered to be more painful to tattoo than others.
The rib cage
The inner elbow
The head and face
The life span of a white ink tattoo depend on different factors like quality of the ink, the skill of the tattoo artist, and the aftercare of the tattoo. But most of time, a white ink tattoo may last between few months to few years.
It is generally best to avoid sleeping on a new tattoo for at least the first few days to avoid irritation or damage of design appearance.
However, if you have neck issues it can be difficult to find a comfortable sleeping position. But here are a few tips that may help you to find comfortable postilion, instead of sleeping on back:
Use a supportive pillow: Make sure your pillow provides enough support for your neck and head, and keep the pillow at a thickness. And it will keep your head and neck in a neutral position.
Use a neck roll: A neck roll can be placed behind the neck to provide extra support and keep the neck in a neutral position.
Use a memory foam pillow: Memory foam pillows mold to the shape of your head and neck, providing optimal support and comfort.