Do hamstring streching and quadriceps streching.apply hot pack

Yes! It's a DOMS so you just need to do overall stretch before you run or do strengthening exercises. Do not stop your activities what you have been doing so far because of pain. It will aggrevate more if you do so.

Hamstring stretching Chiropractic adjustment will help. Towel Hamstring Stretch Lie on the back, supporting the thigh with the hand or with a towel wrapped around it.. Slowly straighten the knee until a stretch is felt in the back of the thigh, trying to get the bottom of the foot to face the ceiling, one leg at a time. Hold the position initially for 10 seconds, and gradually work up to 20 to 30 seconds. Seated Hamstring Stretch While sitting at the edge of a chair, straighten one leg in front of the body with the heel on the floor.

Avoid exercise. Muscle strain is there hot fermentation and rest

Hi as you have just started running so there must be some DOMS(delayed onset muscle soreness) which goes with time as u keep on running and try to do pre and post run stretches  like hamstring stretch,calf stretch,IT band stretch, Quadriceps stretches to avoid this soreness and pain.

Muscle strain because of muscle stiffness   u need to keep ice cubes and some warm water alternative so muscle strain is released.