Marjoram, spanish (thymus mastichina ). Use this oil if you have a cold, bronchitis, or asthma. A few drops on a tissue helps breathing difficulties or use 4-6 drops in a warm bath. It can help relieve menstrual pain and digestive discomfort. Also useful in alleviating exhaustion or overwork. Use in an oil burner, as a massage, compress, in a bath, or for inhalation purposes.