Ringworm?

[BTO]

I just found a half dime sized "blister" for lack of a better word on my upper thigh, almost to the fold where my thigh and pubic crease meet. It is red-ish on the outside, somewhat circular in shape and white and dry on the inside. I also noticed some purpura (about the size of pencil erasers)  lower down adn on the other side, a total of 3. They look like blood blisters a little. These purpura showed up after I had felt a sharp pain, like being bitten by a rather large spider. I am freaking out. I just found out that my boyfriend stepped out of monogamy 7 months ago. He hasn't been tested, and I have been tested in the past and always cleared with a clean bill of health. There are not multiple "blisters" like the red-ish one I described, only one and it isn't painful or itchy. It looks like dried skin in the middle.

What is going on?

[Thatgurl143]

Hi
I too have a a mark on my right foot that looks identical to what she described but I didn't feel anything it just showed up on my foot and has been there for awhile now and I'm just curious if it could be the same thing or different.

[Dr_Aparna]

Hi,
The multiple small blisters which are drying up could be due to insect bites, especially since you felt a sharp stab of pain before you discovered the blisters.Herpetic blisters too are associated with pain but the they are usually clear.Yo can apply an antiseptic cream on these.
However if you are breaking out again then you will have to get it examined.Since you have now discovered that your boyfriend may have been with others, it would be in your best interests to get yourself tested to be on the safer side.
The single patch you described could be due to PR.Pityriasis rosea (PR) is a common, harmless human skin disease which presents as numerous patches of pink or red oval rash, mainly on the torso.Large patches of pink or red, flaky, oval-shaped rash on the torso. A single, large red "herald" patch may occur 1 to 20 days before smaller, more numerous patches of rash.
The rash may be be accompanied by low-grade headache, fever, nausea and fatigue. Over-the-counter medications can help manage these. No treatment is usually required. In most patients, the condition lasts only a matter of weeks.
If it is associated with itching then you may have to consider ringworm, psoriasis and discoid eczema.
For ringworm anti-fungal ointments can be applied and for eczema/psoriasis mild Corticosteroid application.
ref:http://en.wikipedia.org/wiki/Pityriasis_rosea