How can you take a shower with second degree burns?

Indirect flow. Avoid direct stream. Use lukewarm water. Allow water to hit unaffected areas and gently flow over burn. Use recommended soaps such as cetaphil, basis or dove. Antibacterial soaps are not necessary. Gently pat. Don't rub. Jeep covered with ointment or silvadene (silver sulfadiazine) if recommended by physician. Keep protected from shear injury.
Carefully. Wash the area with soap and water. Dry. And cover wounds with a dressing. Don't leave open to air. Check your tetanus status.