@phoebusg if you are a professional nuclear reactor monitor trained and know what to do yes a blinking LED is all you need. But I deal with patients daily and I know that if it doesn’t hurt they’ll never see a doctor.
2 stories: I saw a patient who did not have the use of his right hand for three days because of a stroke. his wife kept telling him to go in but he didn’t think anything was wrong. She finally made him come in by cooking him a big juicy steak, and ploping it in front of him. He asked her to cut it for him, but she told him “if you’re all right, cut it yourself”. That’s how I got to meet him.
I saw a girl who was brought in by her family for seizures. On examining her, I saw that she had dry gangrene on some of her fingers, and indeed, her right index finger was gone at the knuckle. I asked her how that happened and she replied “Oh, it just fell off one day”. To recapitulate, her most important finger had just fallen off one day, but because it didn’t hurt, she saw no need to see a doctor.