Which of the following is NOT true about abrasions?

Abrasions, commonly known as scrapes, are superficial injuries to the skin that typically affect only the outer layer, known as the epidermis. Given that abrasions usually do not penetrate deep into the skin, they do not usually bleed heavily. In fact, while they can cause some bleeding, it is generally minimal compared to other types of wounds such as lacerations or puncture wounds, which can sever blood vessels more significantly.

The other statements accurately describe the characteristics of abrasions. They indeed occur on the skin's surface and can lead to pain and irritation due to nerve endings being exposed. Additionally, they frequently happen as a result of falls or scrapes, further emphasizing their nature as superficial injuries. This is why the assertion that abrasion wounds typically bleed heavily is not true.