If you are to close to the problem, you may not be able to see it as a whole. You will not know how to fix it. You can not see all of it if you are close. It may be that your emotions are to involved - or you do not recognize your own involvement in the cause of the problem. There are many ways a person can be to close. What a person in this situation needs is an opinion of someone you trust. Tell them the situation and ask for advice.

If you hold a magazine close to your face so your nose is touching it, you can't see the whole cover. 'Being too close to the problem' has a similar meaning.