Is it normal to have drains at 7 weeks post operation? What can be done to stop drainage from tummy tuck?

Most surgeons use drains during tummy tuck procedures and most but not all are removed by 10-14 days.  I have had some success using sclerosing agents such as doxycycline in slowing down high output drains.  This may be something to discuss with your plastic surgeon. 

I'm sorry to hear that you're having a difficult time as you recover. Because you mentioned that your incision is red and painful, you may have an infection. Please see your surgeon to have this checked out. The presence of infection should be addressed asap. At the same time, you should also discuss having the drains fixed more securely, so they don't keep coming out. 

For most tummy tucks, the drains can be removed after 1-2 weeks.  There can be a number of factors which cause the drains to drain for longer and your surgeon would be in the best position to know what was done at surgery.  Follow up with your surgeon and ask how best to resolve the high drain output (? sclerosing agents, remove drains and compression garments?).  Once the drains are out the redness around them usually resolves very quickly but you may need antibiotics.