<s>[INST] Approximately 4 days ago all of a suuden I felt my top lip start to swell that it went numb. A few days later the same thing happened on the right bottom lip. Moments later it moved from my right bottom to the left bottom. Nothing has happened agin within the past three days. [/INST] Hello, In my opinion, an allergic reaction may cause issues such as yours. The cause may be anything from flowers, dust, drugs, etc. So, possible allergies should be evaluated with skin tests in order to get a correct diagnosis. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Erion Spaho, Neurologist, Surgical </s>