575lb. Male, fall frequitly. Now I have lg hard spots in stomach area & in thigh area. Should I be worried they have taken. Along time to go away?

Unstable. I do agree with dr. Heller about immediate medical attention. When patients fall they can form areas of blood clots or hematomas in their skin; on the surface they reabsorb slowly sometimes never completely going away. Another problem that is serious is deep vein thrombosis--a medical emergency. If you have trauma from falling a blood clot could form -this is er time asap. Get eval as noted.
See your doc(s) now. You clearly have health issues that demand close follow up. You need to see your doctor(s) now.