Varicose veins get always worse after exercise?

A proper evaluation and vein treatment will only help your cause and would be very helpful in making a treatment plan.   Assuming your varicose veins are bulging and cause some pain or other symptoms, a laser ablation, radiofrequency ablation, Venaseal, Clarivein, phlebectomy and/or foam sclerotherapy  would be a possible solutions.   A comprehensive vein treatment center should be able to offer you most if not all of these options and discuss intelligently the advantages and disadvantages of each with you.   Your varicose vein are presumably refluxing, causing blood to flow up and down, instead of one direction.   Having the diseased "feeding" vein(s) ablated will cause minimal to no down time, and it certainly shouldn’t discourage you from exercising and most patients experience long term or even permanent results.  I would suggest getting a thorough venous reflux ultrasound Doppler exam in the STANDING position in a dedicated "vein treatment" facility in order to get the best results.

Veins and arteries dilate, or get engorged when body temperature increases. When body temperature increases during exercise, the veins dilate, called venodilation. If you have varicose veins, they will become more prominent after exercise or if you shower using warm water or at the end of the day. Varicose veins should be treated if you have symptoms: aching, pain, heavy legs, tired legs, itching over the veins, cramping of the legs, throbbing of the veins, and ankle or leg swelling.Read the free ebook on the link below. If you want to take supplements to keep your veins healthy, we recommend a bioflavonoid product called Varicosamin from VenaSmart.com 

Thank you for the question! Varicose veins will develop when the vein valves malfunction and excess pressure forces the blood to flow backward. Like all veins, they will appear larger during exercise due to increased blood flow. You have a range of treatment options available to treat varicose veins. These include endovenous laser ablation, sclerotherapy, microphlebectomy, and clarivein treatment. In order to determine the right treatment option, you'd have to schedule an in-person consultation with a vein specialist. 
An in-person exam with a board-certified plastic surgeon is the best way to assess your needs and obtain expert medical advice. Best of luck!

Veins will enlarge after exercise normally because of the increased blood flowing through the veins.  The cause of varicose veins are malfunctioning valves of the saphenous system of veins.  If this is treated then this will reduce the incidence of varicose veins but is no guarantee that future veins will not form as a result of other valves malfunctioning.

Thank you for your question. Varicose veins can be treated with Sclerotherapy. The treatment involves
an injection of a chemical that will cause your vein to contract and become
scarred internally. The vein will disappear from your body after some time.
Generally, it takes about 8-10 weeks for the vein to disappear. Please make
sure you get a in person consultation from a board-certified dermatologist.

Exercise is actually a good healthy habit to strengthen your muscles and maintain good circulation; however healthy leg veins contain valves that open and close to help the return of the blood back to the heart. Venous Reflux disease develops when the valves that keep blood in the veins flowing out of the legs and back to the heart no longer function. This causes the blood to pool in the legs forming varicose veins and leading to many other signs and symptoms. Consider an evaluation with a vein specialist who you can trust that will help you make an informed healthcare decision about the best treatment for your case. You have many options and depending on your ultrasound results and type of treatment, the average patient typically can go back to normal activities within a few days.

It is normal to have have increased blood flow with exercise. This helps provide oxygen to those working muscles.  What's not normal is worsened varicose veins "after" exercise. With poorly functioning veins the increase burden on your venous system to return blood back to the heart will cause varicose veins to "bulge" after working out. Large vein disease needs to be evaluated with ultrasound to determine proper treatment. Any vein specialist can help you get the information you need. Go see one. 

Exercise in general is beneficial to vein health.  There are usually two sinuses- cavities- in each calf that fill with blood.  When the calf contracts, it helps to push the blood back to the heart.  Veins getting worse after aerobic exercise may be more in the recovery period, when one will have increased blood flow to help the muscles, but sitting or not moving will allow the veins to stretch.
Weight lifting or hard pounding exercises can sometimes increase the pressure on the veins, especially if holding ones breath or straining.  Make sure to breathe properly through the exercise session.
Compression garments can help, and many athletes wear them to speed up the recovery period.
Once treated, those particular veins should not come back.  You do however have the genetic pre-disposition to form new veins.  Again, compression can help reduce this risk.