If i have a swollen lymph node and nothing is happening to me or harming me, should i be worried or do i let it be.

If the lymph node is swollen get it checked out even if you do not have a side effect yet.

Explanation:

If the problem is not checked out when you first notice it (even if there are no side effects) your lymph nodes can progressively get worse until the damage is irreversible

answer; 4% i believe this is correct;

it is definitely false.