I visited an orthopedician for lower back pain (muscles pain). He gave a few medicines and suggested physiotherapy for 10 days which includes TENS.

Question

. 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.
Back Stretching- lie flat, pull one of the knee forward to chest, hold for 3 seconds, then bring the other knee forward to the chest and again hold for 3 seconds. Then pull both knees towards the chest and hold for 3 seconds. Repeat 10 times each exercise twice a day. Do the cat/cow stretch. Get on all fours, with your arms straight and your hands directly under your shoulders; your knees hip-width apart..

Vishwas Virmani · Accepted Answer

. 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.
Back Stretching- lie flat, pull one of the knee forward to chest, hold for 3 seconds, then bring the other knee forward to the chest and again hold for 3 seconds. Then pull both knees towards the chest and hold for 3 seconds. Repeat 10 times each exercise twice a day. Do the cat/cow stretch. Get on all fours, with your arms straight and your hands directly under your shoulders; your knees hip-width apart..

Poonam Patel Vasani · Answer

Most back pains can be resolved with such conservative measures.Continue with your treatment at present. If problem persists consult again.
These are  some suggestions for your condition. 
1. Sit with straight back and change posture in between. 
Do not hunch and feet should rest on floor while seated.
2. Take breaks in between work and walk.
3. Take rest when back pain is severe but a void total bed rest.
4. Do back strengthening and stretching exercises daily. 
5. Take simple painkillers like paracetamol if pain is persistent. 
6. Apply analgesic cream over back followed by warm fomentation. 
7. Keep pillow behind your knees at bedtime. 
7. Do not bend and lift weights.  
8. If back pain is accompanied with radiating leg pain or tingling , numbness or weakness, consult your doctor immediately.