* Thick hair refers to the diameter of each individual hair strand.
* Dense hair refers to the number of hair strands per square inch of your scalp.
So, you don't need thick hair to have a lot of hair. You can have thin hair strands but still have a high hair density, which would give you the appearance of a full head of hair.
Here's a simple analogy:
* Imagine a bunch of thin threads, tightly packed together. This would be dense, thin hair.
* Imagine a bunch of thick ropes, spaced far apart. This would be sparse, thick hair.
Therefore, having thick hair doesn't automatically mean you have a lot of hair. Density is the key factor in determining how much hair you have.