Itchy red spots on legs

I used to get these annoying red itchy spots on shins and particularly the ankles. When I saw a dermatologist a couple of months ago because of another skin problem and he knew I was a Chronie, he asked "Do you get itchy red spots on ankles?". He further commented I have to apply a topical compounding and take an anti-histamine once they appear or else they will turn into ulcers.
Things are a bit different this time. These red spots have become bigger and they are all over my legs and sometimes the thighs and they make me scratch like crazy. I even wake up from sleep because of the itchiness. When I told my GI about them, he seemed perplexed and told me to follow the dermatologist 's instructions. Does anyone of you get them? What are these?

Is it the same time every year? I have a sister who, when the weather changes, itches all over her stomach and arms. She has said the itch wakes her up. She wasn't able to see a dermatologist in time to get help but I wonder if it's the changing weather, drying up skin?
I used to break out in itchy red bumps when I got cold, all over.

Itchy spots like hives? I have gotten those in the past (allergy doc never managed to figure out my trigger). I keep them at bay by just taking one Zyrtec a day. Sometimes I can stretch one dose out to 48 hours, depending on what time of year it is.

Is there a chance that it's related to being outdoors or having something like fleas or bedbugs causing them (I only ask because you said they start on your ankles and sometimes wake you up at night). If it happened on days you spend time outside walking around in grass, maybe it could be bug or plant - related?

But I'm guessing that if you're like most of us, it's just one of those weird things that happens with no known cause, and we just have to do our best to keep it from driving us nuts. Have you tried anything like Benadryl or Zyrtec?

Don't know if this will help, but I've had similar issues my whole/most of my life. My whole legs have red dots everywhere hair follicles are, and the same for my arms when I was younger but that lessened. But, I'll get red spots that get itchy sometimes sensitive on my left arm that sometimes become a minor lesion that heals as long as I ignore it and don't itch. One dermatologist speculated psoriasis of a lesser degree, possibly due to the fact my crohn's was in flare at the time. Or another said that and eczema, but if it's causing harm or great concern I would go to a dermatologist, but to try something before then, try either a hydrocortisone cream from the drug store, or gold bond cream (not lotion), see how that works after a few days, then decide if you need a dermatologist.