Every summer since i was 15 i have developed a small cluster of water blisters on my chin after being out in the sun, usually whilst on holiday. I am very fair skinned and burn easily however i used sun cream every time i was on holiday. i am now 21 and Last year i used sun block-factor 50 on my chin and the blisters didnt appear and i was so happy, howver this last week the blisters have come back and are obviousley not due to the sun as it is febuary! i have been back to the doctors numerous times about the blisters but he never knows what they are. If u could help in telling me wat the cause it or what they are that would be really appreciated, also if theres any treatments other than keeping the area clean and dry.
thankyou