My aunt is severely obese which is why she can't walk anymore. She has no one to help her at home and is currently being discharged from the hospital and that worries me because she won't be able to do things for herself. I live out of town and she needs help to start walking again.
https://www.agingcare.com/articles/caring-for-a-senior-with-edema-215340.htm
Edema can be a symptom of a bigger problem. If she "needs help walking again"
when she gets home, how are they discharging her if she'll be helpless? If your aunt welcomes your help you will need to start by getting fully informed of her health issues and if she's complying with any medications she's been prescribed. Your aunt needs to take the legal step of making you her durable PoA. You can download the proper forms for her state from sites like Legalzoom.com or Rocketlawyer.com for a minimum fee (like $40) but you will still need to have it witnessed, signed and notarized in her presence. Once it's done, it's done. If she has mental and medical decline it may become too late to create this paperwork.
How far away from her do you live? With a PoA you could tell the hospital hers is an unsafe discharge and they may send her to a rehab facility or to LTC instead. How old is she? What are her financial resources? If she is of meager financial means enough in-home help may not be an option for her. Getting her help will depend on the answers to these questions.