Phuket is generally a safe place to visit, but you should exercise caution and take necessary precautions. Petty crimes, such as theft and pickpocketing, can occur in crowded areas and tourist hotspots. You should also be aware of potential scams with tuk-tuks, taxis, and ping-pong shows. No matter the risk level, I recommend getting travel insurance. I currently use HeyMondo for my travels because they have proven themselves to me more than once over the years. The link above will give you a 5% discount, but If you have another favorite provider, that's ok. Just make sure you have one because you never know what may happen.