The head sweats a lot when you work a little, in two conditions: 1, healthy people have more blood circulation, better physique, more energetic people in the activity after the easy body heat outward excretion, through the evaporation of water to dissipate heat, there will be sweating, the physique of wet people sweat more. 2, some patients can also appear such a situation, need to go to the hospital to check, often heart problems, heart function is not good after the patient activity Feeling a lack of stamina, or insufficient blood and oxygen supply to the head will appear when the body compensatory sweating, indicating poor heart function. If the lungs are diseased, resulting in insufficient oxygen supply, after the activity will also appear in the head blood supply and oxygen supply is insufficient, the same will appear in the head sweating profusely, you need to go to the hospital to do the relevant examination to determine.