Itchy belly button with a foul odor is mostly caused by umbilical infection. The reason for this is that sweat, cortex and other metabolites secreted by the body are stored in the navel, and patients usually do not pay attention to personal hygiene, the navel is relatively moist, which is conducive to the growth of bacteria, so that sweat, sebum and other decomposition, leading to the appearance of odor. With the further invasion of bacteria, the skin at the navel will be infected and lead to umbiliculitis symptoms, resulting in itching phenomenon. For the clinical treatment of such symptoms, patients are generally advised to use antibiotics, such as erythromycin ointment. In addition, some patients may be allergic to the itching phenomenon, you can take anti-allergy drugs, such as paracetamol, to relieve. During this period, patients should pay attention to personal hygiene, keep the navel clean and dry, and avoid contact with water to avoid infection. Avoid allergens in the diet and eat more nutritious foods as well as fresh fruits and vegetables. Strengthening physical exercise and enhancing immunity are helpful for the relief of the disease.