This literature review highlights the importance of recognizing the pig (sus scrofa) as a sentient and highly productive being. Focusing on its senses, which allow it to interact efficiently with its environment. However, confinement can negatively affect these senses, resulting in the appearance of stereotypies as indicators of stress and discomfort. To address this problem, the implementation of environmental enrichment in intensive swine production systems is proposed. In addition, the importance of assessing and managing pain in pigs, especially in procedures such as piglet castration, using tools such as the Melbourne Pain Scale, is highlighted. In conclusion, the need to consider the welfare of pigs, promoting practices that reduce stress, encourage natural behaviors and address pain in the swine industry is highlighted.