Ive seen this in some of my cichlids in the past. Could be flukes, might be nothing. As long as the fish is eating well+ behaving normally most of the time dont worry.
It sounds as though your Cichlids could be up for some lovin !! It would be helpful if you could find out the name of your Cichlids, as we would be able to advise you properly.
sound's to me just cichlid aggresstion, that's why people keep them malawi cichlid's in a tank with alot of other cichlid, it spread's out the agresstion between them all thus leaving picking on a indivdual much more difficult, As long as the other's are ok and no major damage or hiding you will be fine