My grandpa has these dark waxy bumps on his neck that itch

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While seborrheic keratoses can sometimes resemble skin cancers, such as melanoma, there are key differences. Seborrheic keratoses have a uniform color and shape, which is less common in cancerous growths. Melanomas, for instance, often have irregular borders, multiple colors, and asymmetry. However, any change in the appearance of a skin growth should be evaluated by a healthcare professional to rule out malignancy.
4. Why Your Grandpa’s Age And Skin Type Matter
Seborrheic keratosis is more common in older adults, typically appearing after age 50. This prevalence is likely due to cumulative sun exposure and the natural aging process of the skin. Additionally, individuals with fairer skin types may notice these growths more readily, although they can occur in any skin type. Understanding that these growths are a part of the aging process can help in managing expectations and reducing anxiety associated with their appearance.
5. Common Triggers: Sun, Genetics, And Irritation
While the exact cause of seborrheic keratoses is not entirely understood, certain factors are believed to contribute to their development. Sun exposure over many years is thought to play a role, as these growths often appear on sun-exposed areas of the skin. Genetics also significantly influence their formation, as they tend to run in families. Additionally, irritation from clothing or other factors can exacerbate the itchiness and discomfort associated with these growths.
6. When Itching, Bleeding, Or Changes Are A Red Flag 

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