Needing more
Having to use more of a substance, or use it more often, to get the same effect.
Withdrawal
Feeling sick, shaky, anxious, or unwell when you do not use often enough.
Life narrowing
Building your social life or your work life around using.
Mood swings
Swinging between extreme highs, lows, or anxiety.
Changes in sleep and energy
Sleeping much more or less than usual, often at odd hours, or noticeable shifts in energy.
Weight changes
Losing or gaining a significant amount of weight.
Hiding it
Lying to cover up use, being secretive, or taking substances or money to get them.