Welcome to health care magic.
1.Pain less tiny lump in from of the ear - the possible cause will be sebaceous
cyst. generally needs to monitored unless causing any discomfort.
2.They occurs when the gland blocks and causing the collection with in - usually take good time ( years ) to increase in the size.
3.In this case the i would recommend you not to disturb the lump, do not squeeze, press or scratch - in that way you will complicate the process.
4.There is no relation with the stomach symptoms you are facing, a very tiny possibility is enlarged
lymph nodes due to stomach cause - but lump characterisation does not fit there.
5.If any discomfort get it examined and take needful actions accordingly. Good luck.
Hope i have answered your query,
any thing to ask do not hesitate to ask.
http://doctor.healthcaremagic.com/doctors/dr-ganesh/62888