The marks on her body are a record of the fall, and they are easier to read the morning after than they will be in a week. Before you help her with breakfast, look at her with the lights on and take notes while the color is still fresh.
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Check the marks in this order
Start at the head and work down. Look at the scalp, forehead, and behind the ears, then the face and mouth. Any mark on the head, any cut that will not stop, new confusion or sleepiness, or a headache that is getting worse means you call her physician or go to urgent care now, not after the coffee. Those signs do not wait for a pattern.
Next check the arms and hands. Scrapes on the palm or the inside of the fingers mean she reached out to stop the fall, and the direction of the scrape shows which way she was moving. Look at the outer elbow and outer shoulder next, because a bruise there usually means she went down sideways rather than forward.
Then look at the hip, outer thigh, knee, and shin. The hip and outer thigh are where a fall onto a hard surface shows up. A shin bruise, often a row of them, can mean she met the bed frame, the bathroom threshold, or the edge of the tub. Check both legs, since one side usually takes the hit.
Finally check her back and tailbone. A bruise low on the back or at the tailbone usually means she sat down hard, which points toward the toilet seat or the spot where she lowered herself, not the middle of the hall.
Match the marks to the six stops
Take your floor plan and mark where each bruise most likely came from. The aim is to find which stop carries the most marks. A cluster at the bed edge suggests the rise. A cluster at the bathroom doorway or along the hall suggests the walk. A cluster at the toilet suggests the seat. Bruises are not proof, and the same mark can come from different falls, so treat the match as a question to check on the floor, not a finding.
Then walk the trip yourself, in the same light and in the same slippers she wears, and see whether anything at the marked stop could make a person catch a foot, reach for a wall, or drop onto a hip. Write down what you find next to the mark.
Write it down the same way every time
Keep one page, not a diary. For each morning with marks, write the body area, the side of the body, the color and size, and the stop on your plan that the mark points to. Add one line for what she said about the night, if she said anything, and whether she was up before she called for help. Use the words the morning after in place of a date, so the page stays useful however long you keep it.
After two or three entries, read the page from the top. You are looking for repeats: the same shin, the same stop, the same side. A repeat is the reason to bring the page to her physician, along with a list of anything that changed in the house.
What to bring to the physician
Take the page, the floor plan with the marks on it, and a plain note about the times she was up and whether she seemed dizzy, unsteady, or unsure of her footing when she stood. Ask the physician whether the pattern points to something to check in her health, such as balance, sleep, or medicines, and whether a physical therapist should look at the trip. The physician decides what is medical. Your page gives the physician something concrete to work with.
For how this desk checks its own sources, see Sources.