Bulge on the outer wall of a tyre is dangerous

"I see a bulge on the outer wall of the tyre. Have run my new car on this tyre for 1800 kms. 

Is this a serious issue?
Should the tyre be replaced? 
Can it be repaired?" 

The above is a prototype of frequently asked questions in various social media forums. 

Answer: Extremely serious issue. 
Irrespective of whether the tyre has run for 800 kms or 2800 kms or 28000 kms, replace the tyre ASAP if you truly believe that your life and those of your dear ones are important. Tyres with bulges on the side walls can't and shouldn't be repaired. 
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JB Tyres Kolkata (MRF T&S) wishes all roadies pan-India a safe and enjoyable drive. 
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* Indian Roadie Safe Driving Tips, 
* JB Tyres Kolkata _ Indian Roadie Safe Driving Tips, 
* Indian Roadie Knowledge Hub, 
* Indian Roadie Knowledge Hub _ Tyres