In one small study, people put black seed oil drops in their noses to treat mild, moderate, or severe cases of allergic rhinitis, aka hay fever. After 6 weeks, 9 out of 10 people said their sneezing, itchy eyes, stuffy nose, and other symptoms got better or went away completely. That was true for just 3 in 10 people in the group that used regular food oil. More research is needed. Ask your doctor if black seed oil is right for your condition.