Try to drink more water it will help you in producing oil in your skin. If it is after travelling you need a regular CTM routine with products that suits your skin type. use some homemade products like flaours, curd, honey etc. Have you tried Bioderma Sebium range as it also works very nice for acne prone skin. I personally use Bioderma sebium gel moussant, it really works wonders for me.

If you are continuously getting pimples and they are enlarged and red in colour then you need to see your dermatologist I will advise you to avoid face washes containing parabens and alcohol

I would suggest you to try bioderma h20 micellar water to clean your face and then moisturize it.