Using a penis pump will not cure ED but can make the penis sufficiently firm enough to have sexual intercourse. Although doctors have not conducted specific research studies related to how dehydration specifically affects ED, there are Water penis stimulation studies Water penis stimulation literature Water penis stimulation can establish a link. Metal health can directly affect your erectile dysfunction. Penis pumps are often recommended by some urologists and surgeons after certain procedures, such as prostate surgery or radiotherapy for prostate canceras these treatments can cause shortening of the penis. Sign up for a free Medical News Today account to customize your medical and health news experiences. Men also may see bumps on their penis if they have human papillomavirus HPVwhich causes genital warts.