The 54-year-old, who made 86 appearances for the Three Lions between 1979 and 1988 and played in two World Cups, spoke earlier this week of the extent of the personal problems that have hampered him for several years.
Michael Bennett, the PFA's head of player welfare, is in daily contact with Sansom, who is currently staying at a hotel.
"We were aware of what was going on in the previous months so it wasn't a surprise to us, but I can understand why it surprised Joe Public," Bennett told BBC Radio 5 Live's Sportsweek programme.
"The situation is that he's come into the office and we've discussed quite a few different options that are available to him.
"We're waiting for him to make a decision on what option he wants to take. Mostly the options are detox and supporting him in terms of getting better.
"He can do a 28-day detox where he'll have support around him to help him deal with his drinking issues.
"He'll also have support ready for him when he comes out after the detox, as well as trying to find him some housing.
"What option he chooses is up to him. He's in a hotel at the moment, a safe environment.
"There were a couple of days, Kenny said, where he didn't have anywhere to sleep so he was sleeping on a bench in the Bromley area. We don't know where or how.
Source: PA
Source: PA