Two causes that come: to my mind, without any injury (fall or something heavy falling on the foot or ankle) are Gout or Pseudogout. Others include maybe an insect bite. See your PCP to have a blood test and even some fluid removed from the swollen part might provide an answer(Dx).
Answered 9/29/2022
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5 doctors weighed in across 2 answers
A doctor has provided 1 answer
4 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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