Pain in the bottom of the heel, com- monly referred to as Plantar fasciitis is a common finding with Ankylosing Spondylitis. I suffer from this con- dition myself to a minor degree and yes, humidity can aggravate the condition. When I got the pain in the heel really bad I was sent for hydro- therapy but it didn't real help. Staying of f my feet is what helped. I hope this information has been of some help.