Excessive sweating. Vision+a headache!

So this is the problem, I have been experiencing excessive sweating, like abnormally high, I understand that the climate here in Mumbai is humid and we normally face the moisture, but I feel it's different in my case, it's too much, in my sleep, though I have a fan spinning at the full swing I sweat and wet the whole pillow, This incident happened back a week ago, I was traveling in a train, I was standing at the foot board in an near empty train, yet I experienced sweating! I feel really uncomfortable with so much sweating, like when I meet someone all they see is a face which is covered with droplets of water! Note:- I experienced some pain in my muscles and joints few days back but it became normal, and I have blurred vision+a headache!