A plastic boot designed for winter hiking will be much more comfortable on the trail than one for ice climbing. With the current rising popularity in snowshoeing, there are also a number of companies producing winter hiking boots. Many of these are designed with the recreational snowshoer in mind, so if you're heading into the mountains for some rigorous climbing in subzero temperatures, be sure that the footwear you have is appropriate for the use. When heading out in winter, it's important to have appropriate emergency gear. Drink plenty of liquids and carry a reserve of high energy food.
Frostbite is a problem directly related to the sub-freezing temperatures of winter.
Both of these hazards can be avoided with enough knowledge about the causes and remedies and paying attention to the precautions. Being aware of the early symptoms helps avoid potentially serious problems. Hiking in minimum size groups of four or more helps provide a margin of safety in case there is an accident. It also helps spread around the load of the extra equipment recommended for a day of hiking in the mountains. All you really need to do to enjoy snowshoeing is just go out and try it.