A tiny calcific density in the right lung. What does it mean? What is the cause of them? Where did it from? I need a great explanation. Thank you so much

See below. If it is completely calcified, then there is nothing to worry about. Calcified nodules are usually from some type of exposure to something. Histoplasmosis is common in our area.
No worries. You did not describe the density's lung location. In the upper part of the lung, it may be a residue from old TB infection. But then you would likely have multiple ones. Did you ever have pneumonia, fungus infection or chickenpox? They can heal in a way that results in calcific density. Cancer however causes large, not tiny ones. For your age, I say old healed infection. Hope that helps.