Apply Hot Fomentation twice daily.
Avoid bending in front.
Postural Correction- Sit Tall, Walk Tall.
Extension Exercises x 15 times x twice daily - lying on tummy, take left arm up for 3 seconds, then bring it down, right arm up for 3 seconds, bring down. Bring right leg up, hold for 3 seconds, bring it down. Then right leg up and hold for 3 seconds and bring it down. Repeat twice a day- 10 times. Bhujang Asana -- Lie flat on your stomach, keeping the palms out, bend the neck backward, take a deep breath and while holding it for 6 seconds, raise the chest up. Release breath and relax your body. Repeat the exercise 15 times twice daily.
Core Strengthening Exercises- Straight Leg Raised With Toes Turned Outward, repeat 10 times, twice a day.
IF standing straight is the only problem it may be what i understand stooping forward which is pretty normally Abnormal in ageing population but Better undergo, certain Investigations X-ray / MRI . so that the exact cause can be known and treated accordingly.
go for urgent investigation
DO NOT UNDERGO ANY REHABILITATION PROCEDURE UNLESS AND UNTILL the problem can be identified. and also BMD needs to be known before starting any treatment.STAY HEALTHY