How do geckos regenerate its tail?

Answer: Depending on what type of gecko you have, most of them can regenerate their tail, make sure you give them plenty of food and water, when they do not have their tail they are low on energy (tail is where they store fat tissue that they feed off of while shedding, or starving) It can take anywhere between 2 weeks to 4 months depending on how big the gecko is and what species. My crockadile gecko took 1 month Answer:Yes, geckos can regenerate their tails, however it is very stressful for them, and usually takes at least six months