What Does Sudden Pain From The Hips To The Knees Indicate?

my mom has sudden pain from hip to knee. immobile for 3 days now. its swollen and warm but no color change. also recently had a bicep fall off? has sudden vessels pop in her legs with horrible bruising, probably 3 a year. she has nerve damage to right lower arm and hand, sometimes her hand locks in a gruesome contracture witch is painful and lasts for up to 30 minutes with residule pain. diminished use and sensation to that hand. also nerve damage to lower back witch effects how well her legs work that day, she falls a lot. has a-fib., her blood is really thick, she barely bleeds and has been on xeralto for a few years. has high blood pressure. has darkened lower legs lots of abdominal issues .spasms... pain... has bowel movements that vary from loose to foamy or sometimes strandlike... occasionally soft and formed she is 62 overweight non-smoker this has been going over the past few years one thing after another. does she have a rare disorder causing all this...PSST...I m afraid that another muscle fell off in her leg which is the acute issue.