Had small blisters on groin area. They're disappearing, but small redness appeared on head of penis. Tested (-) for hsv1&2. Have a swollen lymph node.

Lichen planis. There are numerous afflictions that affect the skin of different parts of the body. Skin sores or rashes, genital lesions and ulcers, and oral manifestations are common. If you have any oral lesions or markings of gums, lips or tongue, i would look into being tested for lichen planis. It is similar to some other diseases but not an infection from virus, bacteria, or yeast. See dermatologist.

Related Questions

1 random swollen lymph node in groin area for 1 week now. Painful, but not growing, the skin is not red, it is hard but movable, no other symptoms.?

Probably infection. But could be a malignancy or inflammatory condition. Get an exam and blood tests for starters. If doesn't go away, need biopsy. Read more...
Monitoring Centers. Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells and digested food. Lymph nodes "taste" the lymph for anything bad like bacteria/viruses/cancers, etc. When it detects a problem, it alerts the immune system and your body reacts. They enlarge in response to the inflammation they create when they react. They shrink when all is well. Read more...

Swollen lymph node on groin and now a very painful boil popped up on my ear. Hot to the touch and red. Could these be related? What to do?

Unrelated. Boil on ear frequently from infected sebaceous cyst which should be treated with warm soaks and if necessary antibiotics. If resolving and cystic structure found then excision of cyst necessary to prevent recurrence. No way that lymph node in groin can be connected to ear. From the ear, any infection would spread to cervical nodes. Read more...