I lately got some strange marks on my thighs. After searching through the net I found out that they look exactly like stretch marks, but there is no reason for me to get them (I am a young person and have not gained so much weight).
What seems even more strange, I noticed that my roomate got the same kind of marks in the same parts of body and approximately the same time. That is why I am thinking of it as a kind of infection or allergy.
What is more, these marks seem to disappear and reappear during the day. In the morning (or when it is warm) they seem almost unnoticeable, but in the evening or when it gets colder they get red and sharp.
What could it be? I am really concerned, because these mark seem to be expanding and do not fade :(
Will be grateful for any clues,
PS. I read about Bartonella, but I did not get any tick bites lately.