Diffuse Hair Thinning has been used two ways that I have seen so it's important to define and differentiate them
Some people who refer to Diffuse Hair Thinning are referring to Diffuse Alopecia. Diffuse Alopecia is a condition characterized by hair loss over the entire scalp including the sides and back of the head. An example of Diffuse Alopecia is Telogen Effluvium. Diffuse Alopecia is not the same as genetic hair loss. Instead it can be caused by a number of other things not related to DHT.
Some possible causes include:
- Pregnancy or shortly after can cause temporary diffuse alopecia
- Hormonal changes in the body (such as thyroid disorders)
- Iron deficiency can sometimes cause diffuse alopecia
- Scalp determatitus or other inflamation of the scalp
- Certain medications (anticoagulants - blood thinning drugs) can cause diffuse alopecia
- Traumatic Stress (physical or emotional) can sometimes cause diffuse alopecia
- Severe infections such as pneumonia
Treating this type of hair loss depends on the actual hair loss cause. Tests should be performed by a medical doctor to first determine the cause. Tests may include a thyroid gland test to determine it is working properly, and iron levels to ensure they are normal. Certain medications or supplements may be administered to correct the condition. In many cases of diffuse alopecia, no treatment is needed for the hair loss condition it intelsf and in many cases, the hair regrows. Some people however may continue to experience diffuse alopecia where the scalp hair remains thin. Complete baldness however, is exceptionally rare.
Genetic Hair Loss with a Diffuse Pattern:
More commonly on our hair restoration discussion forum, many people refer to a “diffuse thinning” pattern as hereditary hair loss with diffiuse thinning on the top of the scalp only. This differs from Diffuse Alopecia that is characterized by hair loss all over the scalp. With diffuse pattern baldness in hereditary hair loss, the sides and back of the head remain unaffected. These hairs will miniaturize and become vellus hairs over a longer period of time. This type of hair loss is still genetic and can be treated with Propecia (finasteride) and/or Rogaine (minoxodil).