Weight loss, fatigue, skin bruising easily do you no what this could be?

Many possibilities: There are several possibilities , including thyroid disease, but a good history, physical exam and lab work will be necessary to make that determination. Start with your primary who will most likely will be able to get to the diagnosis as well as oversee the treatment plan.

Many Things: There are many possibilities. These are what we call constitutional symptoms and could be associated with some serious illnesses. Please seek medical attention asap.