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.
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Question: 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?

Answer: Similar


Question: Sentence1: How to treat razor scar from shaving? 
 Sentence2: How can I prevent razor scars?

Answer: Dissimilar


Question: Sentence1: Legs are always cold even when I am sweating badly and feet and toes go numb. Why? 
 Sentence2: My feet are numb, could it be a blood clot?

Answer:
Dissimilar