What Causes Hair Loss? Common Reasons for Thinning Hair
Learn about common causes of thinning hair in men and women, including genetics, stress, hormones, medical conditions, and medications.
Hair loss can be frustrating, especially when you’re not sure what’s causing it. While genetics are one of the most common reasons for thinning hair, it’s certainly not the only one. Hormonal changes, stress, certain medical conditions, medications, and nutritional factors can also affect the hair growth cycle.
Understanding the underlying cause of hair loss is an important first step because not every type of hair loss should be treated the same way. We’ll break down some of the most common causes of hair loss in men and women, how they differ, and when it may be time to speak with a hair loss specialist.
Genetics and Androgenetic Alopecia
Genetics are one of the most common causes of hair loss in both men and women. This type of hair loss is known as androgenetic alopecia, often referred to as male or female pattern hair loss.
Androgenetic alopecia happens gradually and is influenced by a mixture of genetics and hormones. In men, it often appears as a receding hairline or thinning at the crown. In women, it more commonly presents as gradual thinning or widening of the part while the frontal hairline may remain relatively preserved.
Because androgenetic alopecia is progressive, hair loss can continue over time without treatment. Identifying it early can be helpful, as medical therapies may be recommended to help slow further hair loss and preserve existing hair. For patients considering a hair transplant, managing the underlying genetic hair loss is also an important part of creating a long-term treatment plan.
Book a consultation if you think you are experiencing androgenetic alopecia.
Stress and Telogen Effluvium
Yes, even stress can cause hair loss! Significant physical or emotional stress can sometimes trigger a temporary form of hair loss called telogen effluvium. This happens when a larger-than-usual number of hairs shift into the resting phase of the hair growth cycle and begin shedding several weeks or months after a stressful experience.
Common triggers of hair loss can include illness, surgery, major emotional stress, rapid weight changes, or other significant changes in the body. Unlike androgenetic alopecia, telogen effluvium often causes more diffuse shedding across the scalp rather than a distinct pattern of thinning.
In many cases, hair growth may gradually recover once the underlying trigger has resolved. However, because increased shedding can have several possible causes, a proper assessment is important, especially if the hair loss is sudden, persistent, or worsening.
Contact the clinic if you are experiencing telogen effluvium or would like to speak to a specialist.
Hormonal Changes
Hormonal changes can affect the hair growth cycle for both men and women, sometimes leading to increased shedding or gradual thinning. Thyroid disorders and other endocrine changes can influence hair growth, while life stages such as pregnancy, the postpartum period, and menopause may also trigger noticeable changes in hair density.
In some cases, hormonal shifts cause temporary shedding. In others, they can contribute to or accelerate an underlying pattern of hair loss.
Because hormonal hair loss can have several different causes, a medical assessment is important. Understanding whether hormones are playing a role can help determine whether further testing, medical management, or another treatment approach may be appropriate.
Medications That May Contribute to Hair Loss
If you notice increased shedding after starting a new medication, it is important not to stop taking it on your own. There are some medications that can affect the normal hair growth cycle, causing more hairs than usual to enter the shedding phase.
Hair loss has been associated with some medications used to treat conditions such as high blood pressure, depression, acne, and certain autoimmune or hormonal conditions. However, the effect can vary significantly from one person to another, and medication-related hair loss is not always permanent.
Speak with your prescribing healthcare provider first so they can help determine whether the medication may be contributing and whether any adjustments are appropriate.
When Should You See a Hair Loss Specialist?
If you have any questions or concerns about changes in your hair, it can be helpful to speak with a specialist. You do not need to wait until hair loss becomes severe before seeking advice.
A consultation can be useful if you notice consistent shedding, a receding hairline, widening of the part, thinning at the crown, or a noticeable change in your overall hair density. Because different types of hair loss can look similar, an assessment can help identify the likely cause and determine whether monitoring, medical therapy, or another treatment approach may be appropriate for you.
At Advanced Hair & Skin Surgery, the goal is to understand what may be contributing to your hair loss before recommending next steps. Even if you are unsure about what you are seeing, a consultation can provide clarity and help you better understand your options.
You can book a consultation here or contact the clinic directly at 825-450-3394.