Pimple/blisters on lips. For so long.

Hi its been more than 2, 3 months I am suffering from this condition where there are small pimples or blisters (I dont even know what these are exactly) are appearing on my upper lip mostly, water comes out of it and there is swelling in morning. I feel a weird sensation on my upper lip. Do drink 3 ltrs of water and keep my lips hydrated also (vaseline petroleum jelly), even after that it feels very dry because it seems like there is hard layer on my lips(like we have with chapped lips) and if I have applied vaseline at night, morning after brushing my teeth if I move finger on my lips skin comes out very easily and my lips becomes soft for 1 day, but those blisters will still be there on my upper lip same sensation water coming from it. Pls help me I dont know what this is and what can be done. Frankly I am scared also what if it becomes more bad due to some medicine thats why waited for so long.