Hot weather is not a sure way to get hives; however, rising temperatures may be a trigger for hives to occur. The occurrence of urticaria is directly related to a variety of internal and external stimuli, poor autoimmunity and resistance, genetics, and emotions. Some patients belong to cholinergic urticaria, which is directly related to elevated temperature. For such patients, heat may be an important factor in triggering urticaria. Some patients may be associated with more sweating when it gets hot and sweat irritation causes hives to appear on the skin. Some patients may be related to the fact that they sweat more after the heat and the bacteria and fungi on the body surface multiply more vigorously, which leads to the onset of hives. Therefore, for more sensitive patients, it is important to keep the skin clean, dry and cool in the summer.