do glp 1 injections hurt Does GLP-1 Injection Hurt? Pain Management Tips Redness After GLP-1 Pen Injection:

First dose to first week Some users notice effects from the very first dose

That depends on whats causing them, since both can be due to cancer and non-cancerous conditions

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P.Aguirre De CarcerD.McSweeneyC.MorrisonM.et al (2011)

10 SIDE EFFECTS ASSOCIATED WITH HYDROQUINONE Mild erythema Burning sensation Dryness Fissuring of paranasal and infraorbital areas Stinging Localized hypersensitivity Pruritus Scaling Exogenous ochronosis HYDROQUINONE WARNINGS Contains sodium metabisulfite which may cause an allergic-type reaction including anaphylactic symptoms and life-threatening or less severe asthmatic episodes in susceptible people