Dear Mr. Yogesh Raghav, I went through your query and can understand your concern. The symptoms of feeling tensed, stammering, sweating and feeling blocked whenever you talk are highly suggestive of underlying anxiety. If if happens only while talking to others, it might be social anxiety disorder. Anxiety disorders are brain dysfunctions in which there is an imbalance of neurotransmitters. You should consult a psychiatrist for complete evaluation and for initiating treatment. Medications like paroxetine would be effective for your condition. In addition, doing exercise daily will hep you relax and feel better. I hope I was able to answer your query. Best wishes, Dr. Sunil Gupta