Say you would want to start eating healthier. You ask your parents or whoever goes grocery shopping in your family to buy less junk food and more healthy food. You can also ask them to keep you on the right track. Since there is less junk food in your house, your family would theoretically start eating better too.
The best treatment is endoscopic therapy to achieve haemostasis. The patient is also given vitamin K to promote clotting while at the same time heparin is stopped.
Even having a cold or sore throat makes you more susceptible to dehydration because you're less likely to feel like eating or drinking when you're sick. So yes you can get dehydrated in the cold.