What I feel is , since there is no signs of Varicose veins
then it should be related to either vitamin deficiency
like vitamin D or may be nerve entrapment. I would not consider still the nerve entrapment as there is no symptom you mentioned like tingling
So either it could be vitamin D deficiency or may be fatigue
induced. Why don't you try taking vitamin D supplement and also try some simple exercise like gradual walking or some aerobic.
Once the stamina improves in the muscular system then the fatigue is delayed and pain doesn't come. Also, vitamin D deficiency is off late too common in many age groups having lack of exposure to sunlight. If any symptoms like numbness, tingling, sharp shooting pain is there then it should be related to nerve entrapment.
You need to get physically examined for it by an orthopedist and some specific exercises will be helpful under a guided physical therapist. Please take the call based on the provided explanation for the history you provided here.
Hope I have answered your query. Let me know if I can assist you further.
Jay Indravadan Patel,
Physical Therapist or Physiotherapist