<s>[INST] Hi,      I have a skin allergy for last 10 years that only occurs in winter season and it occurs when i directly go to sunlight and keep walking until my body get warm after that my whole body changed to red in colour and i get small doted skin. It also occur when i do workout or some body related work. Please give me some suggestion to cure this. [/INST] Hello. Thank you for asking at Chat Doctor. I went through your history and would like to make suggestions as follows:1. I usually treat such patients with cetirizine or levocetirizine when they have symptoms as well as half-an-hour before when symptoms are expected.2. Furthermore, I would also suggest you to avoid exercises causing excessive sweating or which in general increase your body warmth, they can cause these types of hives.3. Furthermore, I would also suggest you to avoid hot/spicy foods and beverages, which may be helpful. Hope above suggestions will be helpful to you. Should you have any further query, please feel free to ask at Chat Doctor. Wish you the best of the health. Thank you & Regards. </s>