Hi Lynn
Welcome to the forum.
You might want to have a look at the following FAQ which explains where everything is;
www.benefitsandwork.co.uk/guides-for-claimants/faq/forum I've moved your post to its own topic, we ask members not to post their questions in other member's topics as it can lead to the wrong advice being given or taken. The members post you posted on was over 3 years 4 months old.
The answer to your question is .... depends on what type of ESA you are sorting about, if you are in receipt of CB ESA then no it will not affect it, if you are in receipt of IR ESA and receive disability premiums such as EDP and or SDP then yes it will affect your ESA.
If you are not sure what type of ESA you are claiming contact your local Welfare Rights Organisation,
advicelocal.uk they may be able to help you, ideally you will still have a copy of your ESA annual increase letter.
Gary