You can tan overnight if you're using a self-tanner. Many self-tanning products recommend leaving them on overnight to allow the color to develop fully. This can result in a deeper, more even tan.
However, it's essential to follow the specific instructions on your self-tanner product as each one has its own recommended development time. Some express tan products may only need to be left on for a couple of hours, while others may require a full overnight session.
If you're concerned about the tanner being sticky or transferring onto your sheets, you can consider using a body powder or loose powder after application. This can help absorb any excess product and make it more comfortable to sleep in.
Important Note: This answer only applies to self-tanning products. Natural tanning from sun exposure is a different process and requires much longer than a single overnight session.
