Hello, Thanks for your query. Red and blue streaks suggest varicose veins, it can be just cosmetic problem but it may present with pain and difficulty in walking. it is more common in women, may be predisposed by contraceptive pills, pregnancy or long standing. Exercise, compression stockings and avoiding constricting postures (like crossing your legs when seated) can help ease discomfort.sclerotherapy and surgery needed in sever cases. You should also check blood glucose levels (for diabetes) and vit C deficiency which may present with purplish discoloration and rashes. Hope it helps. take care!