Chapter 3: Skin Changes, Bruising, and Unusual Nail Discoloration

The skin and nails can sometimes provide clues about changes happening elsewhere in the body.

But they can also change for hundreds of completely harmless reasons.

A bruise, for example, is usually caused by small blood vessels breaking under the skin after an injury.

Some people bruise more easily as they get older because the skin becomes thinner and supporting tissues change.

Certain medications—including blood thinners and some anti-inflammatory drugs—can also increase bruising.

Nutritional deficiencies and blood disorders can contribute to unusual bruising as well.

So seeing a bruise does not automatically mean cancer.

However, frequent unexplained bruising deserves medical attention, particularly if bruises appear without remembered injuries or occur alongside unusual bleeding, persistent fatigue, fever, or other symptoms.

Nail changes require a similar approach.

A dark vertical line beneath a fingernail or toenail can have several possible explanations, including trauma and benign pigmentation.

However, a new or changing dark streak in a nail, particularly one that becomes wider, irregular, or extends onto the surrounding skin, should be evaluated by a dermatologist.

One rare but important possibility is melanoma of the nail unit.

This does not mean every dark nail streak is melanoma.

Most unusual marks have more ordinary explanations.

But because melanoma can become serious when diagnosis is delayed, persistent or changing pigmentation deserves professional assessment.

Changes in the skin can also be relevant.

A mole that changes in size, shape, or color may require examination.

A sore that does not heal normally, repeatedly bleeds, or continues to crust should also be evaluated.

The same goes for a new growth that continues to enlarge.

One useful rule is to pay attention to change.

A stable mole that has looked the same for years is different from a mole that suddenly changes.

A bruise that appears after hitting your leg is different from dozens of unexplained bruises.

A nail discoloration that clearly follows an injury is different from a new pigment band that progressively changes.

These distinctions are far more useful than simply searching the internet for photographs that look similar.

If you notice a persistent or changing skin or nail abnormality, take a clear photograph for comparison and arrange an appropriate medical examination.

🖼️ IMAGE 2 — Place after Chapter 3

Image description:

A realistic European dermatologist examining a patient's fingernail with a dermatoscope in a modern dermatology clinic. The patient is an adult European woman, and the doctor is carefully inspecting a subtle dark nail streak. Clean medical setting, realistic photography, no text, no logo, no watermark.