TASK DEFINITION: In this task you are given a medical question pair hand-generated. Your task is to classify a given post into two categories 1) 'Similar' if the given two questions have a same connotation 2) 'Dissimilar' if the given two questions have a different connotation or meaning.
PROBLEM: Sentence1: At times it stings/strikes me inside my head? Is it cause of sleep or cold or something else? 
 Sentence2: I have not been sleeping well for the past few days because of a cold. Can this cause a sharp striking/stinging pain in my head?

SOLUTION: Similar

PROBLEM: Sentence1: For a week had pain under left breast, worst when rolling to that side in bed or getting up from laying down. most of the time I cannot deep breath? 
 Sentence2: I had a chest injury, now I am having under my breast along with difficulty in breathing. Any remedies? 

SOLUTION: Dissimilar

PROBLEM: Sentence1: What does a measles rash look like? 
 Sentence2: How can I differentiate a measles rash?

SOLUTION:
Similar