It means your adrenals are overworked. This is a good thing. Adrenals are the regulating gland in your body, helping to regulate cortisol levels. If you have low or high stress levels it can cause problems that manifest themselves as anxiety and depression, among other things.
What to do if you wake up sweating? First of all check with your doctor if you’re sick! And then give yourself some time to rest after waking up before getting out of bed or doing anything else strenuous at all – even watching TV for instance. You should only get out of bed when absolutely necessary (like having to go pee).