text: i have been have internal heat for close to 10months,what is the cause and the cure? i have had internal heat for 10months,i have done a hiv test,vdrl test,urine culture,malaria and typhoid,with negative results.my blood pressure is normal,my body temperature is normal,my blood sugar is also normal,yet i keep feeling like my inside is on fire,i sweat in the night,sometimes my head feels very full,and recently i have began to experience some internal movement and itching. cancer