It seems it's because of anxiety I believe you should discuss your concerns in detail with a mental health professional to gain an insight about nature of problem and ways to overcome it through psychotheraputic techniques Consult with me or any psychologist for therapy and counseling Connect with me through practo Follow my Facebook page "juhi parashar -psychotherapist " for mental health issues All the best Seek help for early recovery

Hello Friend, Good that you are seeking a help here. Common reason for lack of concentration is distraction in your mind. If you mind is pre occupied with any anxious or worrying thought due to work pressure or family issues etc, obviously you tend to loose focus on the present suitation. It needs further evaluation of your symptoms to isolate the root cause and suggest suitable treatment plan. Feel free reach me online for further evaluation and recommendation. Be positive. You will be alright soon.