I'm around 50 and this started about a year or two ago. I have researched this and consulted a dermatologist to no avail. My condition does not conform to most skin conditions in that it is not covering an area. It is usually one small spot, red bump like, or simply red sometimes, but at times, extremely itches, like a mosquito bite. It is not a mosquito bite... or bed bug or spider. I have never heard of a bite lasting months or a year. Again it is very random, face, back and stomach... here and there. I try not to scratch, but it just won't go away. The dermatologist is useless. Ahhh... let's try this. like grabbing at straws. To me it's very odd where it happens, the fact it don't spread and the fact it don't go away.