Hi, Visible veins on the forearms are quite common and are typically not a cause for concern. They can be due to a variety of reasons, including genetics, low body fat percentage, and increased blood flow due to exercise or other physical activities. However, in your case, as you mentioned that you are on the chubby side and do not work out much, genetics could be the most likely cause. Regarding the sudden increase in the visibility of veins, it could be due to changes in blood pressure, dehydration, or increased blood flow caused by the ibuprofen you have been taking for your headaches. Ibuprofen is a non-steroidal anti-inflammatory drug (NSAID), which can cause blood thinning and dilation of blood vessels, leading to increased blood flow and consequently more visible veins. If the visible veins are accompanied by pain, swelling, or redness, it may be worth seeking medical advice to rule out any underlying medical conditions. Additionally, if your headaches persist or worsen, you should consult your doctor to identify the cause and receive appropriate treatment. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician