Mushtaq Ahmad Shah suffered a fall during the ruckus in the state assembly on Tuesday when PDP legislators stalled the proceedings, alleging discrimination against areas represented by them in setting up new administrative units by the state government.
Ahmad was taken for treatment to the Jammu Medical College Hospital.
After failing to restore order, Speaker Mubarak Gul adjourned the house till Wednesday.
When the assembly session began in the morning, the speaker had to adjourn the house for 15 minutes after the PDP legislators protested over setting up of new administrative units in the state.
PDP legislators thumped desks and stood up at their seats, alleging the state government's recent decision to set up 659 new administrative units was politically motivated.
They alleged the move was to strengthen the electoral prospects of the ruling Congress-National Conference alliance.
Chaudhary Zulfiqar Ali, a PDP legislator from Dharhal constituency in Rajouri district, jumped into the well of the house, shouting slogans against the state government's alleged discriminatory decision.
When the house met again after the first adjournment, PDP legislators continued to agitate.
There were heated exchanges between Independent legislator from Langat constituency Engineer Rasheed and Minister Mohammad Akbar Lone from the National Conference.
Speaking to the media outside the assembly, PDP president and legislator Mehbooba Mufti said there has been gross discrimination against areas represented by the PDP in the proposed new administrative units.
She said her party would not allow normal functioning of the house till the rights of people seeking new administrative units are met.