My Differin tube does this sometimes. Just give it a tap against the side of the sink before opening
by 2 months, it improved my skin at 50 mg. i use skinoren gel (15% azelaic) and differin .3%. +
i use it for rosacea. i like the texture of the gel and it layers nicely with other products +
My face HATED Differin. I never responded well to azelaic acid either. :(
Rx Azelex (20% azelaic acid) worked for me (applied after cleansing am/pm). Or you could try++
OTC adapalene (brand names Differin, LRP). I'm not currently using salicylic acid, just differin. +
Ymmv. I didn't notice any difference in my skin from using OTC Differin (for anti-aging) until I ++
I used Differin (0.3% version) and purged for almost 3 months while using. But it got better!
Differin - I decided to try this again just on my chin. A week later++
Nice - hope you notice a difference. I use OTC Differin but am always interested in learning of ++