Your condition can be frustrating, unpredictable and depressing. But you can take action! Record your experiences, feelings, your treatment regimen, and your body's reaction. This volume consists of 150 plain college-ruled pages. Cellulitis is an infection of the deeper layers of skin and the underlying tissue. It can be serious if not treated promptly.The infection develops suddenly and can spread through the body quickly. Severe infections can spread deep into the body, and can be life threatening.