Several possibilitie: There are several likely possibilities. If you want to know, you would need to have it looked at by a doctor. If it is not bothering you much, you could wait another week to see if it resolves on its own.
Answered 10/6/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
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