A mental block is an uncontrollable suppression, or repression of painful or unwanted thoughts/memories. Also can be an inability to continue or complete a train of thought, as in the case of writer's block. In the case of writer's block, many find it helpful to take a break and revisit their topic. Another tactic that is used when people with mental blocks are learning new information is repetition. A similar phenomenon occurs when one cannot solve a problem in mathematics which one would normally consider simple. Mental blocks can be caused by physical disabilities or simply a lack of focus. Mental blocks are also often used to describe a temporary inability to recall a name or other information. A sudden cessation of speech or a thought process without an immediate observable cause, sometimes considered a consequence of repression. Mental blocking can be a coping mechanism for mental illnesses such as hysteria, neurosis, and lack of pathology.
Forgetting curve could be associated with mental blocking. The forgetting curve was first described by Ebbinghaus as the natural loss of memory retention over time. Memories can also simply disappear over time from Trace decay which is the weakening of memories over time. This kind of decay stems from both the visual and verbal working memory. Although the triggers decay the sum of the information remains stored. Interference is the phenomenon that a memory can be distorted due to the existence of related memories when it comes to Retrieval. 
Associative blocking is explained as the effects of an interference during a retrieval. Associative blocking can be caused by failure of cues that a specific target, this is because the cue is being replaced by a new cue that grows stronger. This causes the initial cue to deteriorate because each separate memory is competing for first access to the conscious when the shared cue is presented.
Unlearning is associated with two separate stimuli that are attached to a memory trace, the trace is then weakened because it isn't accessed often enough. When one attempted to recover said memory there is an error that happens when a different cue is presented.
Directed forgetting is another name for Motivated Forgetting, meaning that one is forgetting consciously any recent experience that was unwanted.
Cognitive control is known as the ability to access thoughts and memories, but as well as the ability to have control unwanted thoughts from surfacing to the conscious. This kind of Suppression can be linked to he Think/no think (TNT) paradigm which is practice that is designed to remind us of undesired life experiences that result in unwanted feelings, such as a first heartbreak, that we would normally try and avoid thinking about.
Also, repression which is a Freudian theory that is a defense mechanism that destroys undesired feelings, ideas and memories into the unconscious.  This defense mechanism is due to the result to resolve and eliminate psychological hurt.
- Langford, Tim. "Cascades School Resources Room". Lebanon Community Schools. Retrieved 10/2/11. Check date values in:
- Baddeley, Alan (2015). Memory. 711 Third Avenue, New York, NY: Psychology Press. pp. 238–254. ISBN 978-1-84872-183-8.
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