From net I read that keflex is not good for skin infection today. Is it true?

Absolutely not. Keflex has always been one of the mainstay antibiotics for skin infections, right next to penicillin. There are other choices available in case of allergy or resistance.

Related Questions

I am suffering from skin infection in armpit for a week and having keflex 500mg for the a week. It did reduce my pain but not completely and it did not break out instead it is still there. Most badly, Another infection started in the other arm pit.?

See your doctor. if this is a recurrent thing, you could have hydradenitis. You might need to see a surgeon eventually to excise the cysts. For now, see your doctor for more or another antibiotic. . Read more...
Hydradenitis. Recurrent infections in the underarms and groins are called hydradenitis suppurativa. This is a different entity than hyperhidrosis. It is comedolike occlusion of the follicles of hair, causing recurrent infection and purulent discharge. Read more...