Old thread, but I came across the forum searching sweating. I've been looking into this for over a year after putting up with it since teenage, it's been over 20years and it's got worse. I sweated before I started working out, I don't believe being a regular gym goer makes you sweat in everyday life. It may be steroids, I couldn't say bcz I've no experience of them, but it is true eating more protein than you need causes sweat, something most lifters probably do. Aside from a condition, anxiety is a big factor, and that includes anxiety about sweating in the first place. You start sweating or feel like it's coming and you get anxious, this makes you sweat more, anxiety increases further, and it repeats. People have sweat problems whether they work out or not, if it's not hyperhydrosis or another condition(eg thyroid)/reaction(eg sensitivity/allergy) it's likely anxiety. One possible reason lots of gym folk may sweat more besides using/protein/supps is gym junkies tend to be self critical and this can mean a level of anxiety too. The problem with anxious sweating is the brain gets conditioned to tell you to sweat when anxious the more you do it, it becomes a reflex response to stress/anxiety, so the condition tends to get worse unless you find a way to stop it. Ice water, some cooling cloth/clothing, relaxation time, avoiding stimulants- excessive protein,thermogenics,caffeine,chilli,etc. These just make you feel cooler, they don't stop sweats from anxiety, you've got to either physically make it impossible for the body to sweat from particular body parts via various treatments or sort out the anxiety trigger, which is psychological. The latter is bogus imo, unless you find a good hypnotherapist. Treatments include risky surgery which can make it much worse, prescription strength anti-persps which may be too severe for the face, botox which requires repeat treatments every 3-6months and will give you numbness in the treated bodypart and an expressionless face or electrotherapy of target areas.
