Blockage of the lymph nodes mainly affects the return of the lymphatic vessels, resulting in extreme swelling of the limb, which does not appear as ecchymosis, but as depressed puffiness, with indentation of the soft tissues of the skin when pressure is applied to the local swollen area. However, the soft tissues do not rebound immediately after letting go of the pressure, and it takes a few seconds, and in some cases, several minutes, for the soft tissues to fully rebound. In addition, blockage of the lymph nodes can lead to bacterial infection of the local soft tissues, resulting in widespread redness, swelling, heat and pain in the skin in addition to local swelling. The most common form is lymphangitis, which is more common in the lower leg and is commonly known as dermatitis, and can be treated with anti-infective treatment.