I've been exercising a lot recently and I noticed a small bump on my labia majora more on the outer part. It took about a week to heal but now I have another bump still on the labia majora but its under the skin near the labia minora. I'm a virgin, but the only sexual thing I've done with someone is just manual stimulation and that was 6 months ago. Could these bumps be due to the excessive sweating and the friction of exercising? Thanks.