In one sentence, describe what the following article is about:

When you bring your hamster home, chances are it’s going to be pretty stressed out from traveling. Gently place it into its new home and securely shut the door, then let it acclimate for about 24 hours. That way, it will be able to explore its cage without any additional stress.  Try to keep the environment as quiet as possible for that first day. Hamsters already dislike loud noises, but your Winter White will be especially sensitive during this time. If your hamster seems especially nervous or if it is still hiding after the first day, give it a few more days to get used to its new home. If you plan to have more than one hamster, make sure they are the same sex and you introduce them as early as possible. Also, male pairs or groups are less likely to fight than females. If you see your hamsters fighting, separate them as quickly as possible. Be careful, though, as the hamsters may bite. Once your hamster seems comfortable in its new environment, open the cage and slip your hand in. Hold a treat in your open palm, and place your hand flat on the hamster’s bedding. Then, stay as still as possible, letting it come up and explore you on its own terms. Take out your hand after about 5 minutes.  Remove your hand from the cage if the hamster hisses or squeaks. This is a sign that it is afraid.   If you have an especially timid hamster, it may take a few sessions before it approaches your hand. Be patient, since you’re trying to build trust. Let the hamster get comfortable with your hand for a few days before you try to pet it, then wait a few more days before the first time you try to pick it up. Use both hands, and pick the hamster up from beneath its stomach. Cup your hands slightly so you can maintain control over your Winter White. While you’re holding your hamster, keep your hands close to the floor or a tabletop so if the hamster jumps or falls, it won't get hurt.  Be gentle when you’re handling your hamster. Avoid making any loud noises, and never squeeze it. Never try to pick up your hamster from above. It will think you’re a predator, and it may bite you to try to escape. In order to socialize your hamster and keep it feeling comfortable, you should spend time with it every day. While you might want to keep your sessions short to start with, work your way up to 30 minutes or even longer as your hamster starts to enjoy your company more. You can also introduce your hamster to an exercise ball or playpen once it’s comfortable. Every day when you play with your hamster, check it to make sure it looks healthy and alert. If your Winter White seems sick or its behavior changes suddenly, take it to the vet right away.  Some signs of poor health in a dwarf hamster include having a wet tail, bald patches, loss of appetite, chewing its limbs, or discharge around its nose or eyes. If you notice any of these, call your veterinarian and make an appointment. Changes in your hamster’s eating, drinking, or bathroom habits can also be signs of illness. If your hamster isn’t moving and it's been very cold in your house, move the hamster's cage somewhere warm. Your hamster might have gone into hibernation. Make sure your hamster has a safe place to play so it gets all the exercise it needs. Either provide it with a playpen or a sturdy exercise ball, then let it play for about 15-20 minutes at a time, 3-4 times a week. Longer or more frequent play periods could cause your hamster to become stressed.  One option for a playpen is to place a thick towel on the floor of your bathtub, along with a wheel, chew toys, and a food and water bowl. Just make sure there’s no water in the bathtub, and there’s a cover over the drain. Only use an exercise ball on a carpet or rug. On hard floors, your hamster could get too much speed and accidentally get injured. Never try to force your hamster into an exercise ball. Also, don't put your hamster into an exercise ball when it's sleepy. Always watch your hamster the whole time it's out of its cage. Your Winter White may be cute, but it’s also a cunning escape artist. Always double-check the door when you close it. Otherwise, your hamster might take an overnight trip around your home, where it could get lost or hurt. If your cage door gets damaged, replace the cage as soon as possible.

Summary:
Give your hamster at least a day to settle in before you handle it. Introduce multiple hamsters before they’re 12 weeks old. Introduce your hand slowly and offer a treat after the first day. Scoop the hamster up from below when you think its ready to be held. Spend at least 30 minutes a day with your hamster once it's comfortable. Check your hamster’s health every time you handle it. Place your hamster in a playpen or ball a few times a week for exercise. Secure the door when you put your hamster back in its cage.