Lavender isn't just a pretty flower that smells nice, it also has some surprising health benefits. Recent studies have shown that when inhaled lavender can boost deep sleep. The smell increases delta waves in slow-wave sleep, which is the deepest stage of sleep. Early data from ongoing studies has shown that lavender essential oil may have anti-fungal properties. It's also been found to be effective against several species of bacteria. A study on 100 ICU patients found that rubbing lavender essential oil into the patient's feet had noticeable benefits. This included lowered blood pressure, heart rate, respiratory rate and pain. Lavender tea can be an effective way to treat vomiting, nausea, intestinal gas or an upset stomach. Research has shown that lavender can also improve symptoms of anxiety.