**Core Concept**
Pain due to thermal change after trauma occurs due to the release of chemical mediators from damaged tissues, leading to inflammation and nociceptive signaling. This phenomenon is a result of the body's response to tissue injury, involving the activation of various cellular and molecular mechanisms.

**Why the Correct Answer is Right**
The correct answer is related to the process of inflammation, which is a complex cascade of events initiated by the release of chemical mediators such as bradykinin, histamine, and prostaglandins from damaged tissues. These mediators stimulate nociceptors, leading to the transmission of pain signals to the central nervous system. In the context of thermal change, this occurs due to the denaturation of proteins and the release of adenosine triphosphate (ATP) from damaged cells, which further activates nociceptors.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not directly relate to the thermal change and pain response. While tissue ischemia can cause pain, it is not the most direct consequence of thermal change after trauma.

**Option B:** This option is incorrect because it refers to a different type of pain response, which is not directly related to thermal change after trauma. Neuropathic pain is a type of chronic pain that occurs due to damage to the nervous system.

**Option C:** This option is incorrect because it refers to a different mechanism of pain generation, which is not directly related to thermal change after trauma. Mechanical pain is a type of pain that occurs due to mechanical deformation of tissues.

**Clinical Pearl / High-Yield Fact**
The pain response to thermal change after trauma is a result of the activation of nociceptors by chemical mediators, which can be modulated by various therapeutic interventions, including non-steroidal anti-inflammatory drugs (NSAIDs) and corticosteroids.

**Correct Answer:** D.