I dreamed that my foot was pierced by a nail and I lost a lot of blood.

I don't need to be afraid. Dreams are a reflection of emotions. You dreamed that your foot was pierced and you lost a lot of blood. Which means you were a little scared. The subconscious mind also reminds you to be cautious and take every step in reality. As for your dream that your grandmother's leg was broken, it is not a sign of reality. It's just a subconscious reminder to pay attention to how much you care about the people you love in reality. Better go and see them, and you'll be fine. In addition, your dream also reminds you to pay more attention to your health and prevent diseases recently. Hehe, I am a psychological counselor and often help people interpret dreams. I wish you health forever.