Before we even talk about losses this much,  a trader who has a good knowledge about trading,  and probably has studies a whole lot about  trading need no body to tell them that losses are a norm with trading and accepting it is part of trading  too. Somehow I think because some persons do not wait to be well grounded before hoping on the chart, you see them finding it difficult to accept loses and so they have a very terrible approach to it when they suffer it, they become aggressive and impulsive with their next set of trades.

This is why having a trading strategy is always very crucial and making sure to be disciplined enough to follow up with that strategy will be another  saving  grace.  A typical situation whereby you have a good  strategy and a good risk management system with a risky to reward ratio of about 3:1, I don't see a reason why you will panic so much when you get a loss, for this you know that you need to suffer three losses in a row before you become agitated and you also know that a single win cn make up for all of that so you need not take bigger lots or position or even a higher leverage to make up for loses. This is why it is essential to have a good knowledge to get on the chart so you don't suffer losses that messes up with your psychology and trade.