What Are the Causes of Hair Loss in Men?

It’s the same for most men. The hairline is slightly further back than it used to be. The crown appears to be thinner in some lighting. There is more on the pillow than before. By the time it is noticed, it has most likely been going on for a while.

The presumption is that it is a genetic problem, and in some cases, it is. But there are other causes of male balding which most men are not aware of and some of those are totally reversible if caught early enough. An evaluation can help identify which cause you are dealing with.

Male Pattern Baldness

Androgenetic alopecia is a common cause of hair loss in men. Other causes remain possible and may require assessment.

DHT eventually makes hair follicles smaller and smaller over time in men who have the genetic predisposition. The hairs they grow become thinner and shorter each cycle until they finally die off. The temples usually go first, then the crown, eventually connecting.

The part worth knowing is that this process is slow and the follicles are not gone in the early stages. They are miniaturized. Treatments that work on DHT work better the earlier they are started, which is why waiting until there is significant visible loss makes the options narrower than they would have been a few years before.

When Stress Sheds the Hair

Telogen effluvium is the type of hair loss that arrives as a shock because it comes weeks or months after whatever caused it. By then most men have forgotten the illness, the surgery, the stressful few months, the crash diet, and the connection never gets made.

What happens is that the hair growth cycle gets disrupted. A significant physical or psychological stress pushes a large proportion of hairs into the resting phase simultaneously. Two to three months later they all shed at once. Coming out in handfuls in the shower, on the pillow, everywhere. It is alarming enough that men assume the worst.

The good news is that telogen effluvium is largely reversible. Once the body stabilizes and the trigger resolves, the cycle resets. The bad news is that it can run on top of genetic hair loss and make it very difficult to know what is what without someone actually looking at the full picture.

What the Blood Work Sometimes Finds

Hair follicles are metabolically demanding. They need specific nutrients to function and when those nutrients drop, the follicles are one of the first places the body pulls from because hair is not essential to survival.

Iron deficiency is one possible contributor to hair loss. Test results should be interpreted in context, and supplementation is appropriate only when a clinician identifies a need.

Zinc, vitamin D, B12, protein intake, thyroid function. Any of these running low or out of range can show up in the hair before it shows up anywhere else. A man eating too little protein while trying to lose weight, or a man with undiagnosed hypothyroidism attributing his fatigue to work, may have been blaming genetics for something that had a different cause entirely.

Thyroid Problems

Both an underactive and overactive thyroid affect the hair cycle. The loss tends to be diffuse, spread across the scalp rather than concentrated at the temples or crown, which is a different pattern than genetic hair loss. It sometimes also affects the outer edges of the eyebrows.

Testing for thyroid disease is selected and interpreted with symptoms and medical history. A single blood test does not rule out every possible cause of hair loss.

Scalp Issues That Get Missed

Sometimes the problem is not in the follicle at all but on the surface. Seborrheic dermatitis causes inflammation that affects follicle health over time. Fungal infections of the scalp cause patchy loss that gets assumed to be alopecia areata. Folliculitis, if it goes untreated long enough, causes scarring that permanently damages follicles.

These look different from genetic hair loss on examination. A man who has diagnosed himself with pattern baldness based on his own assessment may be looking at something else entirely that responds to completely different treatment.

Medications Nobody Thinks to Mention

Blood thinners, certain blood pressure medications, some antidepressants, cholesterol medications. Hair loss is a listed side effect of enough common medications that it is worth going through a medication list when the timing of loss lines up with starting something new. Most men do not make that connection and neither do a lot of providers unless someone specifically asks.

Alopecia Areata

This one is autoimmune. The immune system attacks the follicles and the result is patchy loss that appears suddenly, smooth round patches that show up without warning. It can affect the beard as well as the scalp. It is not the same condition as androgenetic alopecia, does not follow the same pattern, and does not respond to the same treatments. Getting the diagnosis right is the first requirement before any treatment makes sense.

Why Finding the Actual Cause Matters

Finasteride does not help telogen effluvium. Iron supplementation does not help male pattern baldness. A topical antifungal does not help alopecia areata. The treatments are different for each cause and treating the wrong thing wastes time and sometimes makes things worse.

A useful evaluation begins with the history and scalp examination. Targeted blood tests or other testing may be added when the findings suggest a deficiency or medical condition.

At Wade’s Care First, hair loss gets treated as something worth investigating rather than something to accept. Finding out what is actually driving it is where every useful conversation about options starts.

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