Question

Why does a dull hypodermic needle hurt more than a sharp one?

a) Dull needles have more surface area.
b) Dull needles cause more tissue damage.
c) Dull needles vibrate during penetration.
d) Dull needles create larger wounds.

Answer 1

A dull hypodermic needle hurts more than a sharp one due to its larger surface area and the increased tissue damage it causes.

Step-by-step explanation:

A dull hypodermic needle hurts more than a sharp one because of two main factors:

1. Dull needles have more surface area: Dull needles have a larger surface area compared to sharp needles. When a dull needle is inserted into the skin, it applies the same force over a larger area, increasing the pressure and causing more pain.
2. Dull needles cause more tissue damage: Dull needles can tear and push tissues aside instead of smoothly penetrating them. This causes more tissue damage, leading to increased pain and discomfort.