I know someone who has breathing difficulties. Can obesity be the reason behind it?

Yes, that is possible but the person should consult with a doctor before drawing conclusions, However, abnormalities in pulmonary function (including breathing, ventilatory mechanism and muscle function) are well documented throughout the research.

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Dear ghadeer ,

Obesity is one  main cause  suddenly  occurred breathing difficutles  , ya sure  because I hav expericed it