Thank you for the advice! I think I will go for an allergies test :)
Hi
Welcome to the forum!
One can develop an allergy even later in life and to things that one was never allergic to before. Urticaria is usually triggered by allergens, such as drugs, foods, insect bites, inhaled substances, in response to sunlight, cold, heat, stress, exercise, or a viral infection. Other common allergens are pollen, mold, dust, pet dander, or cosmetics. Since you experienced an itch, just go over these possibilities in your mind. Something may strike you.
One thing is sure from your post. The itch is only on exposed surface. At times when only your legs itch and arms are spared, there is some factor that is affecting the legs—like dust, sand, dirt, direct rays of sun. Next time this happens, keep all these points in mind and eliminate them one by one.
It would also be a good idea to get tested for allergies.
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!