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There seems to be a series of insect bites on the heel

Oct 18 20213 people replied
Description Of Condition:

Recently, I just returned to school and changed the environment. Two days after I came back, this little red bag appeared on my heel. At first, I thought it was a mosquito bag. Now I find that it hasn't disappeared for many days. It has always been very red and has a convex hard feeling. It itches very badly when I scratch it. In the picture, I took it after scratching it

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