<s>[INST] i am a 26 year old male and a university student Ok so every time in winter when I am about to do a activity (Boxing, basketball, running, etc..) or even stand under sun my skin starts to itch very painfully, its mostly all over my upper body and legs. It is really really painfully, it feels like someone is poking me with thousands of needles all over my body. But once I get sweaty it goes away. Sweating makes it go away. Or either i have to cool my body down by pouring some water around my body. And now I have started feeling that the itching attack creates small little white pimple looking things all over my body. Once I get sweaty they go away as well. It even starts even if I m sitting in a classroom. For example when I get nervous, confused or when my body start heating up and it creates the itch and I cant get sweaty in class, so I really have to try my best to annoy it, usually it goes away after couple mins when I cool down. But it’s not like a one time thing, it happens to me every time I m in those kinda conditions (nervous, heating up etc ) Which is part of every day s life. Kindly give me suggestion. I shall be thankful to you. [/INST] Hi, Welcome to Healthcare magic, Interpreting from your clinical history, which you have elucidated well, it is clear that you are having "Sympathetic overactivity". The sympathetic system is part of the Nervous system that gets activated during any sort of stress- 1. Psychological : extremes of emotions- excitement, anxiety, panic, sudden happiness, etc such situations arise when in danger, threat to life, etc 2. Physical : hunger(hypoglycemia), injury, excercise, child birth etc. Now it so happens that some people have a hyperactive Sympathetic system. This has been observed to be familial in many cases. This hyperactive Sympathetic system, could be of two types : Primary- which can occur at any time for no apparent reason, however the suggested trigger factors include eating spicy foods and excessive alcohol or caffeine consumption. Secondary to- * Low Blood Sugar Levels/Diabetes * Overactive Thyroid Gland * Severe Psychiatric Disorders such as major depression or severe obsessive-compulsive disorder (OCD). * Any Type of Cancer * The Use of Certain Medications Your case could fit a diagnosis of : 1. Primary Sympathetic overactivity/ Hyperhydrosis 2. Hypoglycemia-low blood sugar levels/ Diabetes 3. Psychological 4. Sun allergy Please consult either a Physician or dermatologist </s>