They can be further categorized into Campbell's dwarf hamsters, Winter White Russian (Dzhungarian) dwarf hamsters, and Roborovski's (Desert) dwarf hamsters. The first two are very similar in appearance, especially in size and color. Chinese hamsters also appear fairly similar, but belong to the Genus Cricetulus (ratlike hamsters).
The first step is to get it well settled and comfortable. While selecting a home for your dwarf hamster, keep in mind that it is very small and can easily squeeze through small openings. A close wire mesh cage or home intended for a mouse will be quite appropriate.
In the wild, hamsters make and live in burrows, so you can expect them to try to burrow. This will result in scattered shavings if it resides in a wire-sided cage. Thus, an alternative is a ten-gallon glass aquarium, for a pair.
A good home needs a water bottle, an exercise wheel, and a salt block, at least. If you can add tunnels or burrows, you'll have on truly happy hamster. You can create tunnels from toilet paper tubes.
Make a special enclosure for it to sleep in. Make a 2'' opening in a small, closed cardboard box, and place it in any corner of the cage. Don't add any shavings to it, as your hamster will make it comfortable by lining it for himself/herself. You can introduce a chew toy to the cage, and if it likes it then you can add some more.
It is important to clean out the cage once a week, but you only need to replace the box once every few months. Take out the bedding from the cage, and wipe it clean. If the bedding is soiled or damp, replace it with new fresh bedding.
In the wild, this animal will mostly eat seeds and other plant materials. The best food for your hamster is pellets intended for rats and mice, and you can throw in a few seeds. Some people like to feed them vegetables, which is fine as long as the quantity of greens is kept to a minimum, or ideally avoided altogether. Carrots and potatoes are good options.
The best way to pick up a hamster is to pin it down and scoop it up with a handful of its bedding. Once safely nestled in your hands, it should settle down. While handling them, ensure your hands are clean and do not smell of food.