Fashion is a general term that refers to the popular style or practice, especially in clothing, footwear, accessories, and hairstyles. It is often influenced by cultural and social attitudes, and varies over time and from place to place.
Personal style, on the other hand, is an individual's unique and consistent pattern of dressing. It is a way of expressing one's personality and preferences through clothing and accessories. Personal style is not necessarily influenced by the current fashion or trends, but rather by the individual's own tastes, lifestyle, and comfort.
Trend refers to the specific direction in which fashion is moving at any given time. It is a popular style or practice that is embraced by a group of people for a certain period of time. Trends can change rapidly and are often driven by media, celebrities, and fashion industry influencers. They can influence, but not dictate, an individual's personal style.