A member asked:

I've had a strange bite for three days and it has been excreting what i think is serous fluid ever since. i'm not scratching it. is that bad?

A doctor has provided 1 answer
Dr. John Ebner answered

Specializes in Dermatology

Edema (Swelling): An insect bit can cause a lot of swelling (edema) at the site for several days. This happens commonly in people who have more allergies and sensitive skin. I have seen a mosquito bite cause a severe red, swollen (3 inch wide) spot. That swelling can cause the serous fluid to leak through for a few days. However, if it is not getting better by day 5, see your doctor, it could be infected.

Answered 7/27/2015

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