### Possible Causes of Red, Swollen Skin on the Leg Besides Cellulitis Red, swollen skin on the leg can be alarming and may be caused by several conditions other than cellulitis. Here are some possible causes: 1. **Venous Stasis Dermatitis**: This occurs due to poor blood flow in the lower legs, leading to redness, swelling, and sometimes open sores. It usually affects both legs. 2. **Erysipelas**: A bacterial infection similar to cellulitis but affects the upper layers of the skin. It often involves fever and chills and can cause red streaks along the lymph vessels. 3. **Contact Dermatitis**: This is a reaction to something that has touched the skin, causing redness, swelling, and itching. It is usually limited to the area of contact. 4. **Lymphedema**: Swelling caused by damage to the lymph system, leading to fluid buildup. It can cause redness and hardening of the skin. 5. **Deep Vein Thrombosis (DVT)**: A blood clot in a deep vein, often in the leg, causing redness, swelling, and pain. It is a serious condition that requires immediate medical attention. 6. **Shingles (Herpes Zoster)**: A viral infection causing a painful rash, which can be mistaken for cellulitis in its early stages. 7. **Insect Bites**: Reactions to insect bites can cause redness, swelling, and pain, mimicking cellulitis. If you notice red, swollen skin on your leg, it's important to consult a healthcare provider for an accurate diagnosis and appropriate treatment.