There are some habits that are simply painful. Having conversations about something can have an abnormal effect on someone. Breaking out into nervous laughter can be awkward, but there are steps you can take to control outbreak of laughter. Slow down during talking. Some people laugh nervously or laugh because of an uncomfortable silence. Resolve the root cause of the laughter. Most likely the nervous laughter is being cause by the uneasiness related with some social nervousness you may or may not be deliberately aware of. Generate a list if you problems if there is more than one reason for your nervousness. If you are disrupted by anger or prickly statements accompanied with a laugh to make things come off lighter, take a little breath after you say what you have to say. It can calm your nerves.

Get rid of further sources of nervousness. If being in rooms full of packed people cause you l discomfort you may want to consider keep away from these types of situations until you can get a better grip on your anxiety. Try to logically get out of any source of anxiety that is causing nervous laughter.

While you’re in a conversation, in most cases, you can and should tell someone when you’re anxious or uncomfortable or whatever it is that’s making you laugh nervously. It doesn’t have to be an implicated clarification; you just put the truth forward. If you know a particular subject has to arise, if you’re preparing the conversation, jot down your major points. Laughter occurs when the mind goes bare. Be obvious in your thoughts and you’ll speak more effortlessly.

Gain knowledge of breathing techniques. Contain yourself to a room if necessary and practice deep breathing to tranquil your inner self. Clear your mind with each breath you take and recur from the restroom with renewed flavor.

Luckily, this area can be greatly improved with hypnosis and clinical hypnotherapy.
Here are the two most suited choices:
Stop Nervous Laughter