Dizziness three months after heart valve replacement surgery is usually related to malnutrition, adverse drug reactions, insufficient blood supply to the brain and other factors, which can be combined with the cause of the disease to choose general treatment, drug therapy to alleviate the symptoms. 1. Malnutrition: After heart valve replacement surgery, patients have a long-term loss of appetite and cannot eat normally, resulting in insufficient nutrient intake, which can easily cause dizziness. This kind of patients should make some improvements in diet and ensure that the food is nutritionally balanced. 2. Adverse drug reactions: after heart valve replacement, some patients need to take anticoagulants for a long time, which may cause dizziness if used for too long. For asymptomatic patients, no special treatment is needed; if the symptoms are more serious, the drugs should be stopped in time. 3. Insufficient cerebral blood supply: After heart valve replacement, it may cause insufficient cerebral blood supply, when the cerebral blood vessels do not have normal blood supply or oxygen supply, it will cause dizziness, you can follow the doctor’s instructions to take oral vasodilators, such as perphenazine, prostaglandin, and so on. For patients who experience dizziness three months after heart valve replacement, it is recommended to complete the examination as soon as possible to clarify the cause of the disease and then carry out the treatment, and not to use medication on their own.