Cellulitis spreading up the leg

The leg may feel hot, tight, heavy, tender, or painful, with skin redness and swelling becoming broader. A line or streak moving toward the knee or groin can reflect inflammation along lymphatic channels and needs medical advice. Cracks from Athlete's Foot, an ulcer, bite, or wound on the foot can be an entry point. Type 2 Diabetes can increase the need for early review.

Contact a clinician promptly and describe where the redness began, how far it has moved, and whether you have fever or chills. Keep the leg clean, avoid massage and tight socks, and rest it raised if comfortable. Do not puncture blisters or apply harsh creams. Photographing the area can help show change, but it should not delay assessment.

Use urgent services if the spread is rapid, pain is extreme, the skin becomes blistered or dark, or you feel confused, faint, breathless, very weak, or severely unwell. Fever with shaking chills may accompany a serious infection such as Sepsis. Seek same-day advice even without fever when the red area is clearly advancing.

Ask whether the upward movement is consistent with cellulitis, whether a wound or fungal infection needs separate treatment, how to monitor the border, and what response to expect after treatment begins. Ask for clear instructions about returning if the leg changes overnight.