Aesthetic Medical (NASDAQ:AIH) stock is heading higher on Wednesday alongside heavy pre-market trading of the aesthetic medical services company’s shares.The heavy trading activity today has more than 5.4 million shares of AIH stock changing hands as of this writing. To put that in perspective, the company’s daily average trading volume is well below that at only about 70,000 shares.Investors will also note that this movement comes without any clear news from Aesthetic Medical. That includes a lack of press ...