<s>[INST] Hi, I am a lifeguard at my local pool as i was last summer. Last summer went good and I had never been dehydrated or felt like i do this summer. But this year I have felt anxious, constantly tired, at times weak, i feel constantly thirsty, i have to urinate almost every hour of the day,i feel lightheaded and sometimes nauseated. Can you give me any ideas of whats causing this? [/INST] Hello Good Evening,As per your description you did not mention your age and your weight and history of your weight gain or loss.Your symptoms can be just physiological, nothing to worry or can be of Diabetes.Because in Diabetes there are major symptoms are:1. loss of weight2. frequent urination3. increased thirst4. increased hunger.Other symptoms can occur, because you are loosing weight but same physical exertion.So you should rule out, that you are suffered by Diabetes or not, by following investigations:1. Blood Sugar levels (Fasting and PP)2. HbA1c levelRegards. </s>