Greetings, Very curious to know what is the difference between Vicks Vaporub and Essential oils? When I was little, I remember my mother would rub Vicks on my chest and back to releave me of cough and running nose. Also, is Axe Oil similar to essential oils and if no, what is the difference between the two? My sister is going to give birth to her very first baby this year in September, any essential oil recommendations for her specially since she suffers from aching feet and back? And can she use essential oils while she is pregnant?