Thanks for providing more information.
As you describe such skin discoloration on lower leg can be associated with venous insufficiency resulting in varicose veins,Deep vein thrombosis,Stasis dermatitis.
Other possible cause may include Folliculitis.
And prolonged hours of sitting can be a contributing factor.
So further color doppler study of lower limb,CBC,ESR and a clinical examination by your regular doctor should be considered.
And i strongly advise not to ignore your symptoms as such and elevation of legs,stretching and regular legs exercises,short breaks of rest while doing work should be continued.
You can try OTC 1% hydrocortisone cream on affected area for few days to see if it responds.
And make an appointment with your doctor in next few days rather than wait & watch approach.
I hope this helps.
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