To manage chronic nasal dryness and painful crusting, you can use isotonic saline nasal sprays or rinses several times a day to gently soften and clear the crusts. Following this, apply a thin layer of plain white petrolatum or a saline-based nasal gel inside your nostrils with a clean cotton swab to lock in moisture and prevent bleeding. Avoid over-the-counter medicated decongestant sprays, which worsen dryness. Using a cool-mist humidifier in your room is also highly beneficial. Since this has persisted for three years, please consult an ENT specialist to rule out underlying issues and see if a prescription ointment is needed.