I would not recommend sunbeds at all due to the high risk of skin cancer in all countries. If you choose to use a sunbed, you are ok to use one right away after a procedure. Melanoma is one of the fastest rising causes of death across the planet. Spray tanning is a better option.
Thank you for your inquiry. I would advised to wait at least 1 - 2 weeks. If your lips swell post injections they will be sensitive. The tanning bed/sun bed may cause further irritation to your lips and may increase chances of more swelling. Be sure to get the OK from your injector.