Leukopenia is a common hematological disorder that can occur at any age. It is defined as leukopenia when the total number of white blood cells in the peripheral blood consistently falls below four times ten to the ninth power per liter. The onset of this disease is usually gradual with mild symptoms such as fatigue, palpitations, dizziness, low fever, prone to pharyngitis or mucosal ulcerations, and also includes loss of appetite, limb fatigue, insomnia with frequent dreams, and a cold stomach and backache. It makes one more susceptible to viral and bacterial infections such as colds. If leukopenia is caused by an infection, common symptoms include high fever, chills, and body aches. If the total number of white blood cells is significantly reduced, with an absolute neutrophil count below 0.5 times ten to the ninth power per liter, it is referred to as neutropenia. In such cases, the patient may experience chills, high fever, sore throat, headache, joint pain, and in severe cases, even coma and death.