In a dream a red snake refers to the evolution of the subconscious. Red creatures that are slithering along the ground may represent your growing subconscious mind. If a red snake is swimming in the water, it is a reflection of the strong surge in the suppression of the emotions. If you were dreaming about of a red snake inside a box, then it symbolizes your refusal to acknowledge newly developed part of your subconscious. The red snake dream always is alerting you to look around. It is also carrying highly developed hidden message. It means that something important is going around your for some time. The hidden message is not about a fresh thing from your waking life.
Read more about dreaming of Red snake in other dream meanings interpretations.