What about the monkey on your shoulder? Superstition belief

The boils and boils on the body are relatively large. At best, it is melanin deposition, at worst, it is a benign tumor. If stimulated by the outside world, it will cause cancer. So this is not a good thing. According to superstition, growing on the left shoulder is a heavy responsibility, and growing on the right shoulder is a long way to go. People with this kind of boils can become big shots in the future. However, I also have one on my right shoulder, but it's the fourth year now and I haven't become a big shot yet. This statement doesn't seem credible.