Difficult to tell: Moles are different than a knot. If you have a knot in forearm it could be simple swelling due to injury or a bump or can be serious such as tumor and you have some heart related issues as well u can have radiating left arm pain if you are having a heart attack so it is not possible to diagnose the problem without all the details so please contact your family doctor as soon as possible.
Answered 4/24/2015
4.4k views
Not quite: Enough info. Generally takes a much more detailed history.
Answered 3/2/2014
4.4k views
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