The human body contains many natural polymers, such as proteins and nucleic acids. Cellulose, another natural polymer, is the main structural component of plants. Most natural polymers are condensation polymers, and in their formation from monomers water is a by-product.
Alopecia areata is one type of hair loss that typically causes patches of baldness. In some cases, total baldness develops. In many cases, the hair re-grows, typically after several months. In some cases, the hair loss is permanent.
Other causes of hair loss. Different types of hair loss may have different causes. 1  Ringworm of the scalp, which is common in children.  Mental stress or physical stress, such as recent surgery, illness, or high fever. You may have a lot of hair loss 1 to 3 months after severe physical or emotional stress.