Edema refers to which of the following conditions?

Edema is defined as an abnormal accumulation of fluids in tissues, which can result in swelling in various parts of the body. This condition can occur due to a variety of underlying factors such as injury, inflammation, or systemic issues like heart failure or kidney problems. When fluid builds up in the interstitial spaces between cells in the body, it can lead to visible swelling that may be localized to one area or more generalized throughout the body.

Understanding this definition helps clarify the significance of edema in medical contexts, as it can indicate underlying health issues that may require further investigation or treatment. Other options presented are related to different medical or cosmetic concerns but do not accurately describe edema. For example, discoloration of the skin relates to changes in pigmentation or blood flow, while separation of the epidermis from the dermis pertains to skin injuries or certain skin conditions. The use of electric tools for tissue restoration is a procedure related to cosmetic and dermatological treatments, which is entirely unrelated to the physiological condition represented by edema.