Many cancers present with vague or minor symptoms, making them easy to overlook. In certain instances, strange or persistent pimples could either be signs of cancer or even cancerous growths themselves. Unfortunately, because these blemishes often don’t cause discomfort or change one’s appearance significantly, they’re frequently ignored. Below are four types of pimples that deserve closer attention:

1. Unusual Moles

Abnormal moles are among the most common signs of skin cancer. Most people have moles, but if one looks noticeably different from the others, it’s worth getting checked. Warning signs include: a diameter larger than 6 mm, asymmetrical shape, irregular borders, uneven color, unusual elevation or indentation. They may itch, hurt when touched, bleed, or ulcerate.

A key difference: benign moles usually remain stable over time, while cancerous moles change quickly in color, size, or shape.

2. Flat Clusters of Tiny Pimples

If you notice flat, tiny bumps on your face, hands, legs, or genital area, don’t take it lightly. These may be flat warts caused by HPV infection—a risk factor for cancer. Unlike allergic rashes, these do not resolve on their own or improve with topical treatments. They are small (like grains of rice or beans), often grow in clusters, and can cause intense itching. Scratching may leave dark scars, release a white discharge, and spread the infection further.