hi , i am 30 yr old male , and i have had a mole on my shoulder that is CLEAR in color, that last 2 weeks it has started itching at random points during the day to the point it actually hurts. but i noticed today when i went to go shower that it has started to bleed . its not big in size . in fact its rather small, but i want to know is this a cause for alarm?. i have no medical issues, and i am also ex military if that helps with any back ground info. also im 5, 10 and weigh about 142.