Repeated nose bleeds. went 2 doc nothing wrong. today during nose bleed a large clot of blood came out of nostril. not mucus. shld i be concerned

Epistaxis : 80% of people experience this in their lives. A common cause is dry, hot air in the western US, causing nasal dryness and crusting. The nasal tissue cracks and bleeds easily. Treatment includes humidification in bedroom, nasal saline sprays & sometimes vaseline in the nose. It's not a major health hazard, but should an ENT doctor who can better evaluate. There may be problems not seen by PCM.