Good day! I have unexplained bruise on my right shoulder and it causes pain up to my neck. I remember when i was on my high school, i always carry heavy backpacks and always put it on my right. I think it's almost 2years and the bruise is still there. I put cold and hot compress and it lessen the pain. The thing i worried about is the bruise that remained. Is it natural? i'm really worried thankyou so much and God bless you!