<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello sir, I have a problem that once I take a tablet for fever and it caused me alergytic.. I consult a doctor and he said I am alergytic to quinolone antibiotics .. After that there is a black mark below my lips .. It happened one year ago. Till now that black mark is there. Is there any solutions for avoiding that mark... ?  <response>: Hi there Arun. Dermatology is sadly a very visual field as such, one would prefer a clear digital image of the lesion you may upload it on this Chat Doctor website using the upload data icon to the right of your screen. You may alternatively try to use a Comic acid based cream in the evenings a sunscreen in the mornings for best results providing you are not allergic to any of the creams components. Remember to use the sunscreen from dawn to dusk reapply when sweating or bathing or washing to be applied each 3-4 hrs.else the pigment lightening cream will cease to be effective. Good luck heres to a clear skin soon! Chat Doctor. 