Frequent sneezing over a long period of time with a taste of blood is not normal and could be a sign of an underlying issue. It is recommended to try nasal hygiene with a saline solution, avoid keeping windows open in dry or windy weather, change clothes and wash hands after being outside, use a humidifier if the air in your room is very dry, and consult with a pharmacist about possibly taking an antihistamine. It's also important to investigate possible causes of your symptoms such as dust, dry air, dust mites, and other allergens.