I have Lyme Disease, which has over 200 symptoms and is caused by tick bite(s). I have been bitten 4 times that I know of. Needless to say, I am terrified to go outside, walk in the grass or anything like that. Even when I am walking on a sidewalk, if someone has mowed their grass and the cuttings of it are on the sidewalk I get the heee-beee-jeee-beeees! I also am not supposed to be exposed to direct sunlight because of one of the meds I take and also heat effects me adversely, to the point that I will get to acting confused and out of sorts when I am exposed to it. This too is caused by one of my meds.
I do try to get out for walks outside occasionally anyway. I know that it is good for me, even though all this is part of the picture. I go out early in the mornings or near sunset times only though, or stay under an awning and out of direct sunlight. I sit on the porch to do this, basically, and I do enjoy being out there sometimes. I feel safe there. I will say "Hi" to folks walking by even.
I'm an outgoing person, in that I like to talk with folks and be around people. So I go to church, attend the local Senior Center and visit neighbors. These places are all inside and so I feel safe there.
I can even get a panic attack while watching someone on TV or online walking in the grass! I immediately think of ticks and get the chills or something of the sort. I don't own a TV and I am very selective about what websites I visit even because of this. I do belong to National Geographic online though. I like their stories and somehow deal with the fear of grasses and land that I have while watching them.
I have had the Lyme Disease since 1985 or so and I almost died from it in 1990, when it went into my heart. It took 8 Dr.s to find out what was wrong with me and a hospital stay and I.V. antibiotics to cure it that time. Needless to say, this is a big part of my PTSD, but I am also the victim of childhood and adult sexual abuse.