It’s interesting how hair loss can appear pretty straightforward at first glance. Whether it’s bald spots, a receding hairline, thinning hair, or a combination of these, it all seems quite obvious. However, it’s quite surprising to learn that there exists a scale dedicated explicitly to assessing the extent of male pattern baldness. It might make you wonder why there’s a need to quantify hair loss in such a way.
If you’ve observed that your hairline is moving back, you might be experiencing pattern baldness, also known as patterned hair loss. Several grading systems, such as the Norwood scale, are employed to assess hair loss in both men and women. The Norwood scale, also referred to as the Hamilton-Norwood scale, is widely accepted and is a vital tool for evaluating the extent of hair loss and identifying potential factors contributing to it.
How Does the Norwood Scale Work?
The Norwood Scale works by assessing the extent of male pattern baldness and tracking its progression over time. This standardized approach allows for better communication between patients and healthcare providers regarding the severity of hair loss and the potential effectiveness of various treatment options.
The Norwood scale provides a visual representation of the various stages of hair loss, helping to categorize and understand the progression of male pattern baldness. The scale was developed by Dr. James Hamilton and later modified by Dr. O’Tar Norwood, hence the name Hamilton-Norwood scale.
The Stages Of The Norwood Scale
The Norwood Scale consists of seven main stages, each used to measure and categorize the different stages of male pattern baldness. Each stage represents a specific pattern of hair loss, with the earlier stages typically involving a receding hairline and the later stages showing severe hair thinning and loss on the crown area of the head.
Stage 1
In the first stage of hair loss, called Norwood stage 1, there is little to no noticeable hair loss or receding hairline. This stage is considered a normal part of maturing from a teenage hairline to an adult male hairline. It’s not regarded as balding, and it’s essential not to consider hair transplants at this stage as it could damage healthy hair. It’s best to consult a hair transplant doctor to understand if the hair loss is due to aging or early male pattern baldness.
Stage 2
At the Norwood 2 stage, hair loss begins with a receding hairline in an M-, V-, or U-shaped pattern, especially around the temples. This phase, known as a mature hairline, shows minor hair loss but is not considered balding. It’s a good time for treatment, and medications can effectively manage hair loss. Hair transplant may not be an option at this stage, but a qualified expert can assess candidacy and the need for the procedure.
Stage 3
Norwood Type 3 men’s hair loss is characterized by visible hairline recession around the temples, forming a deep M, U, or V shape. Hair loss at the temples and the frontal area of the scalp is expected in this stage. Hair loss at the crown may also occur, known as Class 3 vertex. A hair transplant may be considered at this stage, especially for those with a Stage 3 vertex. It’s important to consider age, family history, and expectations during a hair transplant. Younger men may need to continue using treatments like minoxidil or finasteride to prevent further hair loss.
Stage 4
At Norwood stage 4, there is significant hair loss around the hairline and on the top of the head, resulting in a noticeable bald appearance. Typically, individuals at this stage have a thick strip of hair that separates the receding hairline from the balding area around the crown, forming a “U” shape when viewed from above. Sometimes, there may be a deeper “U” shape with no bald spot on the back of the head. Norwood Stage 4 is considered balding, with significant hair loss above the temples and in the front anterior areas.
Stage 5
In stage 5 of male pattern baldness, the hairline continues to recede, and the bald spot on the crown becomes more severe. The band of hair separating the temples and the crown of the head becomes smaller and thinner. This is when the classic horseshoe pattern of hair loss starts becoming visible.
Stage 6
A strip of thinning hair no longer separates the distinct patches of hair loss. The hair on the top of your head is either completely gone or very sparse. The hair between your temples and crown is thinning or has disappeared. Norwood Type 6 hair loss is highly severe. In Norwood stage 6, the classic horseshoe-shaped pattern of the hair on the back and sides of the head is pretty noticeable.
Stage 7
At stage 7 of the Norwood scale, the most advanced stage of balding, the balding extends to the sides of the head, and only a narrow band of hair is left around the sides and back of the scalp.