Pattern Baldness - Other names for Male Pattern Baldness include: androgenetic alopecia, alopecia hereditaria, hereditary baldness, seborrheic alopecia, common baldness, premature baldness and alopecia androgenetica (the general term which refers to both men and women). Alopecia Androgentica is associated with excessive endocrine gland activity. It is hypothesized that women with thinning hair or Female Pattern Baldness are victims of this as well where (possibly) too much testosterone being generated by their endocrine system.

Alopecia Areata - Generally thought to be an autoimmune disease where well-defined bald patches, often round or oval in shape, on the head, beard and other parts of the body. Often ‘patchy’ areas develop on the parietal (front) and occipital (back) regions of the scalp. Also known as: Alopecia Celsi, Alopecia Cicatrisata, Alopecia Circumscripta, Cazenave's Vitiligo, Celsus' Vitiligo, Jonston’s Alopecia, Porrigo Decalvans and Vitiligo Capitis.

Alopecia Diffusa - Sparse hair loss on the scalp and sometimes on the body as well. The cause may be a nutritional deficiency, a dysfunction of the thyroid gland. Also known as: Alopecia Disseminata.

Alopecia Universalis - A complete loss of hair on all parts of the body. Sometimes occurs as an extension of generalized or advanced form of Alopecia Areata.

Alopecia Cicatrisata - Skin disorder associated with inflammation and tissue destruction such as folliculitis or lupus erythematosus. Suspected bacterial of fungal infection, granulomas such as sarcoidosis, also growing tumor and syphilis or tuberculosis. Also known as: Cicatricial Alopecia: scar forming alopecia.

Alopecia Involutional - The gradual thinning of hair over time with age which occurs in both men and women.

Alopecia Medicamentosa - Hair loss caused by cytotoxic cancer chemotherapy drugs. Sometimes causing diffuse hair loss or complete alopecia of the scalp.

Alopecia Telogen Effuvium - Excessive hair loss, most notably on the scalp. Often associated with illness, stress, extended starvation and malnourishment.

Alopecia Totalis - Complete baldness. All the hair on the head is lost. Total hair loss of the scalp. Thought to be an advanced form of Alopecia Areata.

Alopecia Trichotillomania - Removing one's own hair by plucking or pulling. A disorder frequently seen in children.