Thank you for your reply. It is an interesting theory, and entirely feasable. I have since dismissed my initial thought that I was experiencing an allergic reaction. I did venture back on the coconut oil when whatever it was disappeared. I have had no problems at all with the oil. I have had the mucus thing back last weekend, with many less palpitations, but it was over in a couple of days. It just seems that I get overwhelmed with mucus that my body cannot shift quickly enough. I am sure this is as a result of the oil pulling. I have heard several times that it pulls mucus out of the body. I would assume too that the coconut oil is killing various unwanted beasties, and as I have felt headachy and tired and frankly not too well on several occasions, I am putting it down to that. I feel that I must have my coconut oil and therefore feel that I am doing myself good. Thank you for your Herximer information. I am really interested in learning so it was very welcome.