Rakkoja

Rakkoja is the plural form of the Finnish noun rakko, meaning blister. In Finnish usage, rakkoja refers to multiple blister lesions on the skin and is commonly used in medical and everyday contexts.

A blister is a small pocket of fluid that forms between layers of the skin in response to friction, heat, chemical exposure, or other injury. The fluid helps protect the damaged tissue as it heals. Most blisters occur on the feet or hands but can appear anywhere on the body.

Common causes include ill-fitting or non-supportive footwear, repetitive rubbing or pressure, increased physical activity, heat burns, sunburn, frostbite, and chemical irritation. Blisters may be filled with clear fluid, blood, or may become empty if the skin breaks.

Symptoms typically include a raised, fluid-filled area, tenderness, and discomfort. If a blister ruptures, an open wound can develop that is prone to infection. Signs of infection to watch for include increasing redness, warmth, fever, or pus. People with diabetes, poor circulation, or compromised skin should seek medical advice earlier.

Treatment focuses on protecting the blister while it heals. Do not pop intact blisters. Keep the area clean and dry, and cover with a sterile bandage or blister pad. If ruptured, wash gently with soap and water, apply an antibiotic ointment, and cover. Let healing occur under the protective skin, and avoid removing the overlying epidermis.

Prevention emphasizes proper footwear and socks, breaking in new shoes gradually, keeping feet dry, and reducing friction with padding or moisturizers on high-friction areas.