Finally I self diagnosed the root of the problem and it was the vaseline I was using as a lip balm for years. Within a week of switching to an organic olive oil based lip balm, I was back to normal and haven't had a problem until now, 2 yrs later. I've continued to use an organic lip balm, but have perhaps developed an allergy to one of these 3 ingredients (olive oil, castor oil & beeswax). Has anyone experienced a problem with these ingredients as well?
Also, my POD is not as severe as before, but this time my lips are actually blistering and so tight & dry that I can hardly open my mouth to eat anymore, and smiling/laughing are out of the question! I would love any help I can get!