The skin is a remarkable organ with a variety of important functions, and it plays a vital role in how we perceive the world around us. It is the primary organ responsible for sensing touch, heat, cold, and pain. Allah, Most High, mentions the skin in the Qur'an in relation to punishment, highlighting its role in experiencing physical sensations:

This verse refers to the skin as the place where the disbelievers will experience the punishment of the Fire, and it is mentioned specifically because the skin is the part of the body responsible for feeling pain.

The skin covers the entire surface of the body and contains numerous receptors that respond to various stimuli. These receptors are connected to the nervous system, allowing us to feel pain, touch, heat, and cold. The density of these receptors varies in different areas of the skin, with the fingertips being especially sensitive to touch. These receptors send signals through the nerve fibers to the central nervous system, where the sensations are processed and recognized. The skin contains different types of sensory nerve fibers that detect various sensations: some are sensitive to touch, others to pressure, and some to temperature, both heat and cold. It is specifically in the skin that sensations of heat and cold are detected, and without these receptors, the body would not be able to feel these environmental changes.

Before the advances in modern anatomy and physiology, it was commonly believed that all parts of the body could feel pain. However, with the development of medical science, it was discovered that pain receptors are primarily concentrated in the skin, and other parts of the body do not feel pain in the same way. This scientific discovery was highlighted by Shaikh Zindani, who explained that, for example, if a needle were to be inserted into the body, the pain would cease as soon as the needle passes through the skin and into the flesh. Medical studies have revealed that the skin is indeed the chief source of pain sensations in the body. The nerves responsible for pain, as well as for the sensations of temperature, are located primarily in the skin. This aligns with the Qur'anic description, where the skin is singled out as the organ through which the punishment of the Fire is experienced.

The verse in Surah An-Nisa' (4:56) refers to the changing of skins for the disbelievers as they endure the punishment in Hell. It says, "as often as their skins are roasted through, We shall change them for other skins that they may taste the punishment." This description is significant, as it shows that the punishment is not temporary. The continuous change of skins ensures that the disbelievers are always in a state of pain, as their bodies are repeatedly subjected to the torment of the Fire. This idea also addresses a question raised by some skeptics: "If the skin is burnt, wouldn't the pain stop once it is destroyed?" The Qur'an’s response to this question is profound, as it reveals that Allah will replace the skin, ensuring that the punishment continues. This miraculous description could not have been known at the time of the Qur'an's revelation, but modern science confirms the unique role of the skin in sensation.

In addition to the skin, the Qur'an also describes the punishment of the disbelievers involving boiling water that cuts through their bowels: The description of the Paradise promised to the righteous is that in it are rivers of fresh water, rivers of milk that never changes in taste, rivers of wine delicious to drink, and rivers of pure honey. There they will ˹also˺ have all kinds of fruit, and forgiveness from their Lord. ˹Can they be˺ like those who will stay in the Fire forever, left to drink boiling water that will tear apart their insides? (47:15) This verse is significant because it highlights the anatomical fact that the bowels do not have the same sensory receptors for heat or cold as the skin does. Therefore, when boiling water enters the bowels, it causes excruciating pain, even though the bowels themselves cannot feel temperature in the way that the skin can. The Qur'an accurately describes the sensation of this pain as being like daggers striking the disbelievers, emphasizing the intense and unique nature of the punishment.

The Qur'anic description of the skin and the bowels in relation to the punishment of the Fire aligns remarkably well with modern anatomical and physiological knowledge. The skin is the primary organ responsible for feeling pain, and the description of its role in the punishment of the disbelievers in Hell is scientifically sound. Additionally, the detailed mention of how the bowels are affected by the punishment is also consistent with what we now understand about the human body's sensory system. The Qur'an, revealed over 1,400 years ago, speaks of the intricacies of the human body with such accuracy and depth that it serves as a clear sign of its divine origin. The scientific insights about pain, sensation, and punishment, as described in the Qur'an, demonstrate the truth of Allah’s knowledge and His power over all things. These are not merely metaphors or poetic expressions but descriptions rooted in the deep understanding of the human body, known only to Allah, the Creator.