I think my brother is taking drugs. I don't know what kind but I observed his behavior to be different. He keeps working. He has not been sleeping and his eyes seem really sharp and glossy. He is complaining of numbness and his skin is very sensitive to touch. Am I guessing properly? He's done drugs long time ago and this behavior seem familiar. He can't sit still and seem nervous all the time for the last 4 days now. Any recommendations for his hands? They appear swollen.