Hi friend Welcome to Health Care Magic A beat comes earlier than normal – this itself is not usually felt. The next beat is a bit delayed - longer time to recover from early extra beat – so heart fills more and the beat appears forcible – thud / lubb - - dubb - - lubb - - dubb - lub - - - DUBB / THE FIRST STEP IS TO SEE A CARDIOLOGIST The first step is to see a Cardiologist Irregular heartbeats need to be DOCUMENTED by ElectroCardioGram (EKG). Anaemia / Anxiety / Alcohol / Tobacco (smoking) / Caffeine (too much tea, coffee, cola) / Fever / Infection / Pain / Thyroid / calcium, magnesium / Medicines like Phenylephrine used for ‘cold’; Salbutamol used for asthma and so on - may be responsible.... / Illicit ‘drugs’ like Amphetamine are notorious to cause abnormal beats / At times, abnormal nerve paths in the heart (bypass tracts) or disease of the conduction system may be responsible! Appropriate treatment demands accurate diagnosis And diagnosis demands examination; probably investigation too; get examined Good luck God bless you