In all of Hanuman temples, there would be one thing in common in his idols. They are smeared with Sindhoora (Red Lead) and oil, a symbol of life and strength. Does applying the Sindhoora has any reason behind?

Once when Sita was applying sindoora on the partying of hair on the forehead, Hanuman asked her the reason for doing so. She replied that by applying Sindoora, she ensured a long life for her husband. The more sindoora she applied, the longer Rama's life would be. The devoted Hanuman then smeared his entire body with Sindoora, in an effort to ensure Rama's immortality. Hence Hanuman's idol is always daubed with sindoora.