Your condition is suggesting of osteoarthritis of both knees with varicose veins. Osteoarthritis is a condition presented with degenerative changes in joints and varicose veins is because of the pooling of blood in legs .
Considering your weight and cholesterol inputs you should reduce your weight too.
Next Steps
1. get an x-ray of both knees done.
2. you would be required few physiotherapy as well as occupational therapy sessions for modalities and exercise.
Health Tips
since you are an IT professional you must follow few precautions:
1. Add foot rest while you are sitting and it's height should be high enough so that your knee and ankle should be on obtuse angle..
2. do take intervals in break and perform quick stretches.
3. do not sit or stand for long hours.
4. try compression bandages.
5. don't squat or sit cross legged.
6. go for walking and control your diet and reduce weight