Answer:
Edema, it happens when your small blood vessels leak fluid into nearby tissues. That extra fluid builds up, which makes the tissue swell. It can happen almost anywhere in the body.
Explanation:
further explanations: https://www.webmd.com/heart-disease/heart-failure/edema-overview#:~:text=%22Edema%22%20is%20the%20medical%20term,leak%20fluid%20into%20nearby%..