These two words are often used together. When people describe something, they always say "pain". In fact, there is a big difference between these two words, which can be analyzed from many different angles such as psychology, physiology, word splitting, etc. Pain and pain are understood differently from different angles. For example, psychologically speaking, pain mostly refers to love, while pain mostly refers to hate. And in different moods, these two words are also different. 1. Psychologically speaking

Psychologically speaking, pain is mainly affection and heartache, which has a lot to do with love; pain is mainly heartache and hatred, which has a certain relationship with hate. Physiologically, the two words are synonyms, but psychologically, the two words are completely opposite. For example, in "Peach Blossom Face", "When the flowers fall to the ground in the garden, who will feel pain?" The "pain" here refers to love and distress. And "pain" is mainly connected with some painful words, such as grief, pain, hatred, etc. Most of them refer to emotional discomfort or discomfort. 2. Physiologically speaking

Physiologically speaking, pain refers to the pain caused by disease or trauma, which is relatively mild. The duration is relatively short, basically instantaneous. Pain refers to the uncomfortable feeling caused by illness, which is relatively serious. This may last for a long time, such as stomachache or headache. In this regard, the two are equivalent to synonyms, and many people use them interchangeably. Since the meanings of the words are very similar, many people cannot distinguish their meanings and do not know which word to use where. They mostly rely on their own sense of language. 3. From the wording point of view

From the wording point of view, obstruction means pain, and cold means pain. Pain is mainly psychological, while pain is related to physiology. In fact, there are many interpretations of these two words, and most of them are different. It mainly depends on where we use them. I can’t say which one is correct, I can only say which one is more appropriate for where.