You need to put pure water in a clean container and then process it in some way to eliminate bacterial contamination. You can process the water with heat just like you do when canning, or use a chemical like chlorine or iodine.
That said, from what you are describing several causes come to mind. They are deviated septum, vasomotor rhinitis or nasal polyps. It sounds like you might have a nasal polyp on the right side of your nose. A nasal polyp is noncancerous, sac-like over-growth of inflamed tissue lining the nose or sinuses that can block nasal airway. Since it is the same side all the time, you might also have a deviated septum that occurs when the thin wall between your nostrils is displaced to one side, making one nasal passage smaller.
Answer. Nose bleeds (also known as epistaxis) are a very common problem. They are usually benign and do not require immediate emergency medical attention. However, sometimes they are severe and require medical attention from a specialist. The most common cause of nose bleeds is trauma to the nose. This is most often in the form of nose picking, or from blunt trauma to the face. Often a contributing factor is dry nasal passages that make the nose easier to injure and bleed. Besides trauma, other common cause of nose bleeds is infection. If you have had an upper respiratory tract infection recently, then this will make your nose more susceptible to bleeds.