When one cracks a knuckle, the stretching of the capsule lowers the pressure inside the joint and creates a vacuum which is filled by the gas previously dissolved in the synovial fluid. This creates a âbubbleâ which then bursts producing the characteristic âpoppingâ or âcrackingâ sound.
DOCTORS: Click here for the Professional Version. Burns are injuries to tissue that result from heat, electricity, radiation, or chemicals. Burns cause varying degrees of pain, blisters, swelling, and skin loss. Deep, extensive burns can cause serious complications, such as shock and severe infections. Small, shallow burns may need only to be kept clean and to have an antibiotic cream applied.
As your bodyâs largest organ and its first line of defense, your skin can sometimes reveal a medical condition thatâs affecting you. Whether you have red skin thatâs hot to the touch, skin bumps that itch, or a skin rash that just looks unusual, changes in your skin are nothing to ignore.Here are some of the most common skin symptoms and why they might occur. Skin Symptom No. 1: Red Skin. Here are possible causes of red skin: 1  Rosacea.hether you have red skin thatâs hot to the touch, skin bumps that itch, or a skin rash that just looks unusual, changes in your skin are nothing to ignore. Here are some of the most common skin symptoms and why they might occur. Skin Symptom No. 1: Red Skin. Here are possible causes of red skin: 1  Rosacea.