You may need a surgery. Do not delay or ignore. Consult an Orthopaedic ASAP. For more info: www.drbakularora.com www.facebook.com/drbakularora

Quadriceps strengthening exercises- Quad Clenches: Lie flat on your back or sit upright on a chair with leg kept horizontally on another surface. Now, tighten the muscle on the front of the thigh by pushing your knee down. You should feel your thigh muscles clench, Hold for 3 secs. Repeat 10 times twice a day. Short Arcs: Lie flat on your back or sit upright with your leg placed horizontally on a flat surface like a chair or bed. Place a rolled up towel under the knee. Pull your toes towards you and clench you thigh muscles. Slowly lift your foot up off the bed until your knee is straight (keep your knee resting on the towel). Hold for 3 secs and slowly lower them on the chair. Repeat 10 times twice a day. Straight Leg Raise: Lie flat on your back. One leg and knee will be straight and other leg should be bent. Pull your toes towards you and tighten/clench the muscle on the front of the thigh, locking your knee straight. Lift your foot up in the air, about 6 inches off the bed. Hold for 3 secs and slowly lower the leg. The knee must remain straight the whole time you are doing this exercise.

You can secondarily  try pemf modality if available in any near by physiotherapy clinic it has some bone growing nature that can help upto two weeks..

Stop using over the counter drugs,avoid steroids if your are using it. We need to know if it is stage II a where you will need a minor surgery or IIb wherein you might need hip replacement.

Stage 2? Wait and watch

You should surely get a consultation of  a good experinced established orthopaedic surgeon..

If there is no subchondral collapse then you can try to get core decompression done with or without bone marrow transplantation.