If you have a cold and are dizzy and unsteady, you should first rest immediately to avoid falling and causing secondary injuries. Secondly, cold dizziness and unsteadiness may be related to the cold itself, but also may be related to taking cold medicine, according to the specific situation to take appropriate treatment. 1. Cold itself: cold may cause nasal congestion and other symptoms, resulting in lack of oxygen to the brain, causing dizziness, nasal decongestants such as ephedrine nasal drops or antihistamines such as loratadine and other medications to relieve the symptoms; colds may also be due to fever and sweating, resulting in a lack of water in the body, the lack of blood volume can be caused by the brain to appear dizziness and other symptoms, need to drink more water to prevent dehydration. 2. Cold and flu medicines: As taking cold and flu medicines such as phenmetrazine tablets or antihistamines such as loratadine and cetirizine may have side effects such as dizziness, drowsiness, etc., it is recommended that you do not take a variety of cold and flu medicines at the same time when you have a cold and flu, and stop taking them if the side effects are serious. Dizziness and unsteadiness can also be caused by other diseases, such as cervical spondylosis. If the symptoms are serious or persistently unrelieved, it is recommended to consult a doctor in a timely manner to clarify the cause of the disease and rationalize the treatment under the doctor’s guidance.