Document what changed
Compare current symptoms, limitations, treatment, and functional impact with the evidence that supported the existing rating. Focus on changes that can be documented.
Use current medical evidence
VA states that increased claims generally require current evidence showing that the disability has worsened. Treatment notes, examinations, and other current clinical evidence can be relevant.
Lay evidence can add context
Statements from the Veteran or people who regularly observe the condition may help describe frequency, severity, duration, and functional effects when those observations are within the person's knowledge.